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	<title>Comments on: Is 450 ppm politically possible?  Part 4:  The most urgent climate policy (and it isn&#8217;t a CO2 price)</title>
	<link>http://climateprogress.org/2008/05/05/is-450-ppm-politically-possible-part-4-the-most-urgent-climate-policy-isnt-a-co2-price/</link>
	<description>The Latest on Climate Science, Solutions, and Politics</description>
	<pubDate>Sat, 17 May 2008 01:06:57 +0000</pubDate>
	<generator>http://wordpress.org/?v=2.1</generator>

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		<title>By: David B. Benson</title>
		<link>http://climateprogress.org/2008/05/05/is-450-ppm-politically-possible-part-4-the-most-urgent-climate-policy-isnt-a-co2-price/#comment-12069</link>
		<author>David B. Benson</author>
		<pubDate>Mon, 05 May 2008 18:12:16 +0000</pubDate>
		<guid>http://climateprogress.org/2008/05/05/is-450-ppm-politically-possible-part-4-the-most-urgent-climate-policy-isnt-a-co2-price/#comment-12069</guid>
					<description>Ugh.  Wave goodby to the future, methinks...</description>
		<content:encoded><![CDATA[<p>Ugh.  Wave goodby to the future, methinks&#8230;</p>
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		<title>By: Kirk Sorensen</title>
		<link>http://climateprogress.org/2008/05/05/is-450-ppm-politically-possible-part-4-the-most-urgent-climate-policy-isnt-a-co2-price/#comment-12070</link>
		<author>Kirk Sorensen</author>
		<pubDate>Mon, 05 May 2008 18:19:23 +0000</pubDate>
		<guid>http://climateprogress.org/2008/05/05/is-450-ppm-politically-possible-part-4-the-most-urgent-climate-policy-isnt-a-co2-price/#comment-12070</guid>
					<description>&lt;i&gt;Over the next five years, Italy will increase its reliance on coal to 33 percent from 14 percent. Power generated by Enel from coal will rise to 50 percent.&lt;/i&gt;

You can thank the Italian moratorium on nuclear power for that one.

Much like corn ethanol, Europe is discovering the law of unintended consequences.</description>
		<content:encoded><![CDATA[<p><i>Over the next five years, Italy will increase its reliance on coal to 33 percent from 14 percent. Power generated by Enel from coal will rise to 50 percent.</i></p>
<p>You can thank the Italian moratorium on nuclear power for that one.</p>
<p>Much like corn ethanol, Europe is discovering the law of unintended consequences.</p>
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		<title>By: Joe</title>
		<link>http://climateprogress.org/2008/05/05/is-450-ppm-politically-possible-part-4-the-most-urgent-climate-policy-isnt-a-co2-price/#comment-12072</link>
		<author>Joe</author>
		<pubDate>Mon, 05 May 2008 18:30:09 +0000</pubDate>
		<guid>http://climateprogress.org/2008/05/05/is-450-ppm-politically-possible-part-4-the-most-urgent-climate-policy-isnt-a-co2-price/#comment-12072</guid>
					<description>There   It is little doubt that a moratorium on coal makes more sense than a moratorium on nuclear power.  That said, given the current cost and bottlenecks in the nuclear industry, I doubt that could have substituted for much of this.</description>
		<content:encoded><![CDATA[<p>There   It is little doubt that a moratorium on coal makes more sense than a moratorium on nuclear power.  That said, given the current cost and bottlenecks in the nuclear industry, I doubt that could have substituted for much of this.</p>
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		<title>By: OregonJ</title>
		<link>http://climateprogress.org/2008/05/05/is-450-ppm-politically-possible-part-4-the-most-urgent-climate-policy-isnt-a-co2-price/#comment-12074</link>
		<author>OregonJ</author>
		<pubDate>Mon, 05 May 2008 18:46:57 +0000</pubDate>
		<guid>http://climateprogress.org/2008/05/05/is-450-ppm-politically-possible-part-4-the-most-urgent-climate-policy-isnt-a-co2-price/#comment-12074</guid>
					<description>Here is the scorecard on this among the 3 candidates:

H. Clinton - Yes, I support a moratorium
B. Obama - Yes, I support a moratorium 'if necessary'
J. McCain - I support a moratorium only if we build enough nuclear plants in exchange, and give the nuclear power industry $100s of billions in pork</description>
		<content:encoded><![CDATA[<p>Here is the scorecard on this among the 3 candidates:</p>
<p>H. Clinton - Yes, I support a moratorium<br />
B. Obama - Yes, I support a moratorium &#8216;if necessary&#8217;<br />
J. McCain - I support a moratorium only if we build enough nuclear plants in exchange, and give the nuclear power industry $100s of billions in pork</p>
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		<title>By: Jesse Jenkins</title>
		<link>http://climateprogress.org/2008/05/05/is-450-ppm-politically-possible-part-4-the-most-urgent-climate-policy-isnt-a-co2-price/#comment-12075</link>
		<author>Jesse Jenkins</author>
		<pubDate>Mon, 05 May 2008 18:55:25 +0000</pubDate>
		<guid>http://climateprogress.org/2008/05/05/is-450-ppm-politically-possible-part-4-the-most-urgent-climate-policy-isnt-a-co2-price/#comment-12075</guid>
					<description>Joe, just a note: as I read Obama's plan, it falls short of a moratorium on uncontrolled coal plants.  "Standards that ban new traditional coal facilities" could just mean banning new pulverized coal plants and requiring "CCS-ready" coal gasification (IGCC) plants, but not necessarily plants that start with CCS installed.  I assume that's what he means.  Even John Edwards, who took the strongest stance against coal in the primary (among the top three candidates) stopped short of a total ban on unsequested plants, and clarified that he meant CCS-ready plants only.  

While a ban on pulverized coal plants would go a long way, it falls short of what you are advocating in this post I think.</description>
		<content:encoded><![CDATA[<p>Joe, just a note: as I read Obama&#8217;s plan, it falls short of a moratorium on uncontrolled coal plants.  &#8220;Standards that ban new traditional coal facilities&#8221; could just mean banning new pulverized coal plants and requiring &#8220;CCS-ready&#8221; coal gasification (IGCC) plants, but not necessarily plants that start with CCS installed.  I assume that&#8217;s what he means.  Even John Edwards, who took the strongest stance against coal in the primary (among the top three candidates) stopped short of a total ban on unsequested plants, and clarified that he meant CCS-ready plants only.  </p>
<p>While a ban on pulverized coal plants would go a long way, it falls short of what you are advocating in this post I think.</p>
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		<title>By: Paul K</title>
		<link>http://climateprogress.org/2008/05/05/is-450-ppm-politically-possible-part-4-the-most-urgent-climate-policy-isnt-a-co2-price/#comment-12082</link>
		<author>Paul K</author>
		<pubDate>Mon, 05 May 2008 19:48:10 +0000</pubDate>
		<guid>http://climateprogress.org/2008/05/05/is-450-ppm-politically-possible-part-4-the-most-urgent-climate-policy-isnt-a-co2-price/#comment-12082</guid>
					<description>450 ppm is necessary to prevent the end of creation, out of control feedback Hansen-Romm hyper warming projection. This projection is far greater than the IPCC and the consensus view in climate science. Since global governments are enjoined to use the IPCC as the basis for policy, the answer is 450 is not politically possible. Governments should not base their policies on the worst case scenario. Banning coal plants without something in place to to take their place is pie in the sky.</description>
		<content:encoded><![CDATA[<p>450 ppm is necessary to prevent the end of creation, out of control feedback Hansen-Romm hyper warming projection. This projection is far greater than the IPCC and the consensus view in climate science. Since global governments are enjoined to use the IPCC as the basis for policy, the answer is 450 is not politically possible. Governments should not base their policies on the worst case scenario. Banning coal plants without something in place to to take their place is pie in the sky.</p>
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		<title>By: Michael Shellenberger</title>
		<link>http://climateprogress.org/2008/05/05/is-450-ppm-politically-possible-part-4-the-most-urgent-climate-policy-isnt-a-co2-price/#comment-12086</link>
		<author>Michael Shellenberger</author>
		<pubDate>Mon, 05 May 2008 20:19:54 +0000</pubDate>
		<guid>http://climateprogress.org/2008/05/05/is-450-ppm-politically-possible-part-4-the-most-urgent-climate-policy-isnt-a-co2-price/#comment-12086</guid>
					<description>Joe, 

Thanks for this thoughtful post. I'm impressed by your honesty about the limitations of what cap and trade, and a price for carbon, can achieve. 

In the next day or two we'll be posting a long-ish essay of the politics of dealing with global warming, both in light of the McCain-Clinton calls for a tax holiday, your essay, and the potential cap and trade Senate vote next month. 

Michael</description>
		<content:encoded><![CDATA[<p>Joe, </p>
<p>Thanks for this thoughtful post. I&#8217;m impressed by your honesty about the limitations of what cap and trade, and a price for carbon, can achieve. </p>
<p>In the next day or two we&#8217;ll be posting a long-ish essay of the politics of dealing with global warming, both in light of the McCain-Clinton calls for a tax holiday, your essay, and the potential cap and trade Senate vote next month. </p>
<p>Michael</p>
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		<title>By: Joe</title>
		<link>http://climateprogress.org/2008/05/05/is-450-ppm-politically-possible-part-4-the-most-urgent-climate-policy-isnt-a-co2-price/#comment-12088</link>
		<author>Joe</author>
		<pubDate>Mon, 05 May 2008 20:49:09 +0000</pubDate>
		<guid>http://climateprogress.org/2008/05/05/is-450-ppm-politically-possible-part-4-the-most-urgent-climate-policy-isnt-a-co2-price/#comment-12088</guid>
					<description>Michael -- I appreciate your comment.

But don't take what I think is pretty clear evidence that only a direct government regulation -- an emissions standard -- can stop new coal plants fast enough, to mean that a cap is pointless.  Far from it -- the cap/trade allows the market to figure out the most cost-effective substitute for coal.

And remember, since we both want an 80% reduction by 2050, we're ultimately going to have to shut down a lot of coal plants.

And what I urge you to think hard about it is the fact there is no technology, existing or breakthrough, that has any chance whatsoever of causing somebody to shut down an existing coal plant down -- in the absence of a strong cap/price.</description>
		<content:encoded><![CDATA[<p>Michael &#8212; I appreciate your comment.</p>
<p>But don&#8217;t take what I think is pretty clear evidence that only a direct government regulation &#8212; an emissions standard &#8212; can stop new coal plants fast enough, to mean that a cap is pointless.  Far from it &#8212; the cap/trade allows the market to figure out the most cost-effective substitute for coal.</p>
<p>And remember, since we both want an 80% reduction by 2050, we&#8217;re ultimately going to have to shut down a lot of coal plants.</p>
<p>And what I urge you to think hard about it is the fact there is no technology, existing or breakthrough, that has any chance whatsoever of causing somebody to shut down an existing coal plant down &#8212; in the absence of a strong cap/price.</p>
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		<title>By: Steve Kretzmann</title>
		<link>http://climateprogress.org/2008/05/05/is-450-ppm-politically-possible-part-4-the-most-urgent-climate-policy-isnt-a-co2-price/#comment-12089</link>
		<author>Steve Kretzmann</author>
		<pubDate>Mon, 05 May 2008 20:50:13 +0000</pubDate>
		<guid>http://climateprogress.org/2008/05/05/is-450-ppm-politically-possible-part-4-the-most-urgent-climate-policy-isnt-a-co2-price/#comment-12089</guid>
					<description>Joe,

Nice post, I fully agree, with two notes:

1) We need to hear people calling as loudly for a moratorium on tar sands and other unconventional oil development as we are for coal.  Hansen's recent paper that suggested we could continue to burn oil if we had a moratorium on coal also assumed no significant exploitation of tar sands (I think he used 2001 production numbers).  We are significantly above that now, and investment is streaming into Alberta.  Meanwhile pipelines and new refineries are being built south of the border that will lock in this carbon intensive option for a long time.  Those fights are now.

2) As you know, its not so much that we can afford to burn all or most of the remaining oil and gas, as its that we can afford (in theory) to emit as much CO2 as is currently in those reserves.  But there are values inherent in how we frame that choice.  In the US, and in the OECD overall, the dominant source of emissions is oil from transport, and that will likely continue.  In many (most) developing countries, its coal, in theory for electrification and energy for many who don't have it (I say in theory only because too often the reality is new coal plants to power factories manufacturing goods for export...).

So, isn't it just a bit uncomfortable for us in the North to be insisting on a coal moratorium while we are doing little about our own dominant source of emissions?

None of this should be construed to say we don't need a moratorium on new coal, particularly in the US and industrialized nations.  We absolutely do.  But I am concerned that the framing of we can "survive the burning of almost all of the world’s conventional oil and gas" ignores the equity aspect of this argument.</description>
		<content:encoded><![CDATA[<p>Joe,</p>
<p>Nice post, I fully agree, with two notes:</p>
<p>1) We need to hear people calling as loudly for a moratorium on tar sands and other unconventional oil development as we are for coal.  Hansen&#8217;s recent paper that suggested we could continue to burn oil if we had a moratorium on coal also assumed no significant exploitation of tar sands (I think he used 2001 production numbers).  We are significantly above that now, and investment is streaming into Alberta.  Meanwhile pipelines and new refineries are being built south of the border that will lock in this carbon intensive option for a long time.  Those fights are now.</p>
<p>2) As you know, its not so much that we can afford to burn all or most of the remaining oil and gas, as its that we can afford (in theory) to emit as much CO2 as is currently in those reserves.  But there are values inherent in how we frame that choice.  In the US, and in the OECD overall, the dominant source of emissions is oil from transport, and that will likely continue.  In many (most) developing countries, its coal, in theory for electrification and energy for many who don&#8217;t have it (I say in theory only because too often the reality is new coal plants to power factories manufacturing goods for export&#8230;).</p>
<p>So, isn&#8217;t it just a bit uncomfortable for us in the North to be insisting on a coal moratorium while we are doing little about our own dominant source of emissions?</p>
<p>None of this should be construed to say we don&#8217;t need a moratorium on new coal, particularly in the US and industrialized nations.  We absolutely do.  But I am concerned that the framing of we can &#8220;survive the burning of almost all of the world’s conventional oil and gas&#8221; ignores the equity aspect of this argument.</p>
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		<title>By: Joe</title>
		<link>http://climateprogress.org/2008/05/05/is-450-ppm-politically-possible-part-4-the-most-urgent-climate-policy-isnt-a-co2-price/#comment-12090</link>
		<author>Joe</author>
		<pubDate>Mon, 05 May 2008 20:56:19 +0000</pubDate>
		<guid>http://climateprogress.org/2008/05/05/is-450-ppm-politically-possible-part-4-the-most-urgent-climate-policy-isnt-a-co2-price/#comment-12090</guid>
					<description>Paul K --   I am quite confused by your post.

The IPCC clearly calls for limiting carbon dioxide concentrations to below 450 ppm.  If you missed that, you haven't been reading this blog or their reports.  

Start here:  http://climateprogress.org/2007/12/06/must-read-bali-climate-declaration-by-scientists/

This is not just the whim of me and Hansen.  Please!

Second --  we have a clear substitute for new coal here in the states:  efficiency plus concentrated solar thermal.  New coal is absurdly expensive now.  If we had a sensible set of utility regulations, nobody would build a new coal plant simply as a matter of cost- ineffectiveness.</description>
		<content:encoded><![CDATA[<p>Paul K &#8212;   I am quite confused by your post.</p>
<p>The IPCC clearly calls for limiting carbon dioxide concentrations to below 450 ppm.  If you missed that, you haven&#8217;t been reading this blog or their reports.  </p>
<p>Start here:  <a href="http://climateprogress.org/2007/12/06/must-read-bali-climate-declaration-by-scientists/" rel="nofollow">http://climateprogress.org/<span style="font-size: 1px;"> </span>2007/<span style="font-size: 1px;"> </span>12/<span style="font-size: 1px;"> </span>06/<span style="font-size: 1px;"> </span>must-read-bali-climate-declaration-by-scientists/<span style="font-size: 1px;"> </span></a></p>
<p>This is not just the whim of me and Hansen.  Please!</p>
<p>Second &#8212;  we have a clear substitute for new coal here in the states:  efficiency plus concentrated solar thermal.  New coal is absurdly expensive now.  If we had a sensible set of utility regulations, nobody would build a new coal plant simply as a matter of cost- ineffectiveness.</p>
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		<title>By: Joe</title>
		<link>http://climateprogress.org/2008/05/05/is-450-ppm-politically-possible-part-4-the-most-urgent-climate-policy-isnt-a-co2-price/#comment-12091</link>
		<author>Joe</author>
		<pubDate>Mon, 05 May 2008 21:00:19 +0000</pubDate>
		<guid>http://climateprogress.org/2008/05/05/is-450-ppm-politically-possible-part-4-the-most-urgent-climate-policy-isnt-a-co2-price/#comment-12091</guid>
					<description>Steve:

Your points are well taken, which is why I was saying at the end that the West has no credibility to tell others not to use coal until we stop using it.  If Paul K were right -- if there were not a bunch of plausible affordable alternatives -- then it would be game over.  Fortunately he isn't right.

I will be blogging on this later in the series, but clearly we're going to use all of the natural gas.  Peak oil is really the only thing that is going to slow down oil consumption.  Yes, the world will have to be adult enough to ban most forms of unconventional oil by, say, 2020.

But everything starts with the moratorium on traditional coal.</description>
		<content:encoded><![CDATA[<p>Steve:</p>
<p>Your points are well taken, which is why I was saying at the end that the West has no credibility to tell others not to use coal until we stop using it.  If Paul K were right &#8212; if there were not a bunch of plausible affordable alternatives &#8212; then it would be game over.  Fortunately he isn&#8217;t right.</p>
<p>I will be blogging on this later in the series, but clearly we&#8217;re going to use all of the natural gas.  Peak oil is really the only thing that is going to slow down oil consumption.  Yes, the world will have to be adult enough to ban most forms of unconventional oil by, say, 2020.</p>
<p>But everything starts with the moratorium on traditional coal.</p>
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		<title>By: Steve Kretzmann</title>
		<link>http://climateprogress.org/2008/05/05/is-450-ppm-politically-possible-part-4-the-most-urgent-climate-policy-isnt-a-co2-price/#comment-12094</link>
		<author>Steve Kretzmann</author>
		<pubDate>Mon, 05 May 2008 21:19:46 +0000</pubDate>
		<guid>http://climateprogress.org/2008/05/05/is-450-ppm-politically-possible-part-4-the-most-urgent-climate-policy-isnt-a-co2-price/#comment-12094</guid>
					<description>Joe:

I guess what I'm saying is we might find we gain even more credibility by tackling our own biggest source of emissions - oil. 

And by 2020, I doubt we're going to be able to have an adult conversation about the billions in tar sands infrastructure that is being built now that needs to be stranded..."a tremendous waste of capital that should be avoided at all cost."</description>
		<content:encoded><![CDATA[<p>Joe:</p>
<p>I guess what I&#8217;m saying is we might find we gain even more credibility by tackling our own biggest source of emissions - oil. </p>
<p>And by 2020, I doubt we&#8217;re going to be able to have an adult conversation about the billions in tar sands infrastructure that is being built now that needs to be stranded&#8230;&#8221;a tremendous waste of capital that should be avoided at all cost.&#8221;</p>
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		<title>By: Michael Shellenberger</title>
		<link>http://climateprogress.org/2008/05/05/is-450-ppm-politically-possible-part-4-the-most-urgent-climate-policy-isnt-a-co2-price/#comment-12097</link>
		<author>Michael Shellenberger</author>
		<pubDate>Mon, 05 May 2008 22:02:08 +0000</pubDate>
		<guid>http://climateprogress.org/2008/05/05/is-450-ppm-politically-possible-part-4-the-most-urgent-climate-policy-isnt-a-co2-price/#comment-12097</guid>
					<description>Joe, You write:

&lt;blockquote&gt;
Finally, the failure to stop building coal without CCS over the next few years is not fatal to achieving 450 ppm — but it would mean that unless someone comes up with a practical and affordable post-combustion CCS technology, most of those coal plants plants will have to be shut down before the end of their normal lifetime, possibly much soooner. &lt;/blockquote&gt;

I'm hearing that the cost of capture for the air capture technologies could be feasible at $50 and maybe even $30/ ton of CO2. Where does air capture fit into your analysis?</description>
		<content:encoded><![CDATA[<p>Joe, You write:</p>
<blockquote><p>
Finally, the failure to stop building coal without CCS over the next few years is not fatal to achieving 450 ppm — but it would mean that unless someone comes up with a practical and affordable post-combustion CCS technology, most of those coal plants plants will have to be shut down before the end of their normal lifetime, possibly much soooner. </p></blockquote>
<p>I&#8217;m hearing that the cost of capture for the air capture technologies could be feasible at $50 and maybe even $30/ ton of CO2. Where does air capture fit into your analysis?</p>
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		<title>By: David B. Benson</title>
		<link>http://climateprogress.org/2008/05/05/is-450-ppm-politically-possible-part-4-the-most-urgent-climate-policy-isnt-a-co2-price/#comment-12098</link>
		<author>David B. Benson</author>
		<pubDate>Mon, 05 May 2008 22:06:07 +0000</pubDate>
		<guid>http://climateprogress.org/2008/05/05/is-450-ppm-politically-possible-part-4-the-most-urgent-climate-policy-isnt-a-co2-price/#comment-12098</guid>
					<description>$140 per ton of carbon is about $126 per tonne of carbon.  That's enough money, I believe, to produce carbonaceous materials from biomass via pyrolysis or torrification (and maybe even hydrothermal carbonization) and then deeply burying the stuff in abandoned mines or carbon landfills.

If utilities actually had to pay that as a price of emitting CO2, that looks like about enough $$ to put the equivalent amount of carbon back underground.d

Altrnatively, the utilities could just burn the carbonaceous materials produced from biomass and forget about burning coal.</description>
		<content:encoded><![CDATA[<p>$140 per ton of carbon is about $126 per tonne of carbon.  That&#8217;s enough money, I believe, to produce carbonaceous materials from biomass via pyrolysis or torrification (and maybe even hydrothermal carbonization) and then deeply burying the stuff in abandoned mines or carbon landfills.</p>
<p>If utilities actually had to pay that as a price of emitting CO2, that looks like about enough $$ to put the equivalent amount of carbon back underground.d</p>
<p>Altrnatively, the utilities could just burn the carbonaceous materials produced from biomass and forget about burning coal.</p>
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		<title>By: Tommaso Boggia</title>
		<link>http://climateprogress.org/2008/05/05/is-450-ppm-politically-possible-part-4-the-most-urgent-climate-policy-isnt-a-co2-price/#comment-12100</link>
		<author>Tommaso Boggia</author>
		<pubDate>Mon, 05 May 2008 22:25:22 +0000</pubDate>
		<guid>http://climateprogress.org/2008/05/05/is-450-ppm-politically-possible-part-4-the-most-urgent-climate-policy-isnt-a-co2-price/#comment-12100</guid>
					<description>Kirk, the Italian nuclear moratorium was a smart and progressive policy enacted at a time when Italians still had some sense. As Joe recently posted (http://climateprogress.org/2008/05/05/should-we-take-italian-nuclear-waste/), Italy is already in deep trouble trying to get rid of its nuclear waste accumulated over less than 30 years of operation, just imagine where we would be (speaking as an Italian) had we continued the nuclear program. 

The current coal resurgence is more of a function of the conservative turn in Italian politics and the shamefully short-sighted world-view of most Italians. Climate change is barely discussed in the American presidential race, but in Italy it was a non-issue altogether. Just to give you an idea of how desperate the environmental scene is in Italy, the Greens decided to form a coalition with the communist party and ended up losing more votes than ever, with the neo-fascist and bigoted Lega Nord winning over all of their former populist base.</description>
		<content:encoded><![CDATA[<p>Kirk, the Italian nuclear moratorium was a smart and progressive policy enacted at a time when Italians still had some sense. As Joe recently posted (http://climateprogress.org/2008/05/05/should-we-take-italian-nuclear-waste/), Italy is already in deep trouble trying to get rid of its nuclear waste accumulated over less than 30 years of operation, just imagine where we would be (speaking as an Italian) had we continued the nuclear program. </p>
<p>The current coal resurgence is more of a function of the conservative turn in Italian politics and the shamefully short-sighted world-view of most Italians. Climate change is barely discussed in the American presidential race, but in Italy it was a non-issue altogether. Just to give you an idea of how desperate the environmental scene is in Italy, the Greens decided to form a coalition with the communist party and ended up losing more votes than ever, with the neo-fascist and bigoted Lega Nord winning over all of their former populist base.</p>
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		<title>By: tidal</title>
		<link>http://climateprogress.org/2008/05/05/is-450-ppm-politically-possible-part-4-the-most-urgent-climate-policy-isnt-a-co2-price/#comment-12102</link>
		<author>tidal</author>
		<pubDate>Mon, 05 May 2008 22:34:37 +0000</pubDate>
		<guid>http://climateprogress.org/2008/05/05/is-450-ppm-politically-possible-part-4-the-most-urgent-climate-policy-isnt-a-co2-price/#comment-12102</guid>
					<description>Michael Schellenberger writes: "I’m hearing that the cost of capture for the air capture technologies could be feasible at $50 and maybe even $30/ ton of CO2. Where does air capture fit into your analysis?"

Where are you hearing that? This would certainly be a welcome "breakthrough" but I find it difficult to fathom that this could be done at scale for that cost. I note that you referring strictly to the "capture" aspect, and not the all-in cost including storage... Obviously capture from ambient air has theoretical advantages, such as the ability to locate the capture points nearby the storage points. But even given that, I still find it hard to believe that we are near achieving those capture costs for ambient air - it's inevitably much more expensive than capture of removing concentrated carbon emissions at point sources...

Anyhow, I am sure we'd all like to hear more from your sources... it would be a welcome development for sure... it would surprise the hell out of me, but I would love that kind of surprise...</description>
		<content:encoded><![CDATA[<p>Michael Schellenberger writes: &#8220;I’m hearing that the cost of capture for the air capture technologies could be feasible at $50 and maybe even $30/ ton of CO2. Where does air capture fit into your analysis?&#8221;</p>
<p>Where are you hearing that? This would certainly be a welcome &#8220;breakthrough&#8221; but I find it difficult to fathom that this could be done at scale for that cost. I note that you referring strictly to the &#8220;capture&#8221; aspect, and not the all-in cost including storage&#8230; Obviously capture from ambient air has theoretical advantages, such as the ability to locate the capture points nearby the storage points. But even given that, I still find it hard to believe that we are near achieving those capture costs for ambient air - it&#8217;s inevitably much more expensive than capture of removing concentrated carbon emissions at point sources&#8230;</p>
<p>Anyhow, I am sure we&#8217;d all like to hear more from your sources&#8230; it would be a welcome development for sure&#8230; it would surprise the hell out of me, but I would love that kind of surprise&#8230;</p>
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		<title>By: Kirk Sorensen</title>
		<link>http://climateprogress.org/2008/05/05/is-450-ppm-politically-possible-part-4-the-most-urgent-climate-policy-isnt-a-co2-price/#comment-12104</link>
		<author>Kirk Sorensen</author>
		<pubDate>Mon, 05 May 2008 23:22:15 +0000</pubDate>
		<guid>http://climateprogress.org/2008/05/05/is-450-ppm-politically-possible-part-4-the-most-urgent-climate-policy-isnt-a-co2-price/#comment-12104</guid>
					<description>&lt;i&gt;Italy is already in deep trouble trying to get rid of its nuclear waste accumulated over less than 30 years of operation, just imagine where we would be (speaking as an Italian) had we continued the nuclear program.&lt;/i&gt;

Wow, at this point you might have enough to cover a basketball court.

Congratulations on all your new coal.  Sounds like a "smart and progressive policy" to me.</description>
		<content:encoded><![CDATA[<p><i>Italy is already in deep trouble trying to get rid of its nuclear waste accumulated over less than 30 years of operation, just imagine where we would be (speaking as an Italian) had we continued the nuclear program.</i></p>
<p>Wow, at this point you might have enough to cover a basketball court.</p>
<p>Congratulations on all your new coal.  Sounds like a &#8220;smart and progressive policy&#8221; to me.</p>
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		<title>By: Joe</title>
		<link>http://climateprogress.org/2008/05/05/is-450-ppm-politically-possible-part-4-the-most-urgent-climate-policy-isnt-a-co2-price/#comment-12109</link>
		<author>Joe</author>
		<pubDate>Tue, 06 May 2008 01:14:44 +0000</pubDate>
		<guid>http://climateprogress.org/2008/05/05/is-450-ppm-politically-possible-part-4-the-most-urgent-climate-policy-isnt-a-co2-price/#comment-12109</guid>
					<description>Michael:  I have one wedge of coal with CCS -- and that is probably optimistic.  As I wrote in Part 2, "Why not more than 1 wedge of CCS? That one wedge represents a flow of CO2 into the ground equal to the current flow of oil out of the ground. It would require, by itself, re-creating the equivalent of the planet’s entire oil delivery infrastructure."

You write:  "I’m hearing that the cost of capture for the air capture technologies could be feasible at $50 and maybe even $30/ ton of CO2. Where does air capture fit into your analysis?"

The price you are talking about is what people are putting in PPT projections, nothing more.  Yes, it is a technology worth pursuing.

But it is hard to see how pulling CO2 out of the air when it is in concentrations of 385 parts per million could possibly be cheaper than capturing it from a very concentrated 100,000 pppm stream post-combustion, or even higher precombustion.

And where will you put it?  One wedge is 3.67 billion tons of CO2 -- even liquefied (which takes a lot of energy) it equals, as I noted, the current flow of oil out of the ground.  

So one wedge of captured CO2 -- no matter how is captured -- by 2050 is probably very optimistic.  I see air capture as a post-2050 strategy, possibly post-2100.  If CO2 storage on a wide scale proves practical and affordable, then IGCC with CCS, or even post-combustion capture at coal plants seems likelier to me.</description>
		<content:encoded><![CDATA[<p>Michael:  I have one wedge of coal with CCS &#8212; and that is probably optimistic.  As I wrote in Part 2, &#8220;Why not more than 1 wedge of CCS? That one wedge represents a flow of CO2 into the ground equal to the current flow of oil out of the ground. It would require, by itself, re-creating the equivalent of the planet’s entire oil delivery infrastructure.&#8221;</p>
<p>You write:  &#8220;I’m hearing that the cost of capture for the air capture technologies could be feasible at $50 and maybe even $30/ ton of CO2. Where does air capture fit into your analysis?&#8221;</p>
<p>The price you are talking about is what people are putting in PPT projections, nothing more.  Yes, it is a technology worth pursuing.</p>
<p>But it is hard to see how pulling CO2 out of the air when it is in concentrations of 385 parts per million could possibly be cheaper than capturing it from a very concentrated 100,000 pppm stream post-combustion, or even higher precombustion.</p>
<p>And where will you put it?  One wedge is 3.67 billion tons of CO2 &#8212; even liquefied (which takes a lot of energy) it equals, as I noted, the current flow of oil out of the ground.  </p>
<p>So one wedge of captured CO2 &#8212; no matter how is captured &#8212; by 2050 is probably very optimistic.  I see air capture as a post-2050 strategy, possibly post-2100.  If CO2 storage on a wide scale proves practical and affordable, then IGCC with CCS, or even post-combustion capture at coal plants seems likelier to me.</p>
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		<title>By: Eli Rabett</title>
		<link>http://climateprogress.org/2008/05/05/is-450-ppm-politically-possible-part-4-the-most-urgent-climate-policy-isnt-a-co2-price/#comment-12112</link>
		<author>Eli Rabett</author>
		<pubDate>Tue, 06 May 2008 04:06:18 +0000</pubDate>
		<guid>http://climateprogress.org/2008/05/05/is-450-ppm-politically-possible-part-4-the-most-urgent-climate-policy-isnt-a-co2-price/#comment-12112</guid>
					<description>An interesting place to grab the CO2 from would be cement kilns.  OTOH Michael Schellenberger is probably hearing that from Roger Pielke Jr. who is a &lt;a href="http://sciencepolicy.colorado.edu/prometheus/archives/environment/000658get_ready_for_air_ca.html" rel="nofollow"&gt; great fan of CO2 air capture&lt;/a&gt; and cheerleads &lt;a href="http://sciencepolicy.colorado.edu/prometheus/archives/climate_change/001185the_politics_of_air_.html" rel="nofollow"&gt; newspaper articles&lt;/a&gt; on it.  It never made any sense.</description>
		<content:encoded><![CDATA[<p>An interesting place to grab the CO2 from would be cement kilns.  OTOH Michael Schellenberger is probably hearing that from Roger Pielke Jr. who is a <a href="http://sciencepolicy.colorado.edu/prometheus/archives/environment/000658get_ready_for_air_ca.html" rel="nofollow"> great fan of CO2 air capture</a> and cheerleads <a href="http://sciencepolicy.colorado.edu/prometheus/archives/climate_change/001185the_politics_of_air_.html" rel="nofollow"> newspaper articles</a> on it.  It never made any sense.</p>
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		<title>By: Peter Wood</title>
		<link>http://climateprogress.org/2008/05/05/is-450-ppm-politically-possible-part-4-the-most-urgent-climate-policy-isnt-a-co2-price/#comment-12115</link>
		<author>Peter Wood</author>
		<pubDate>Tue, 06 May 2008 05:08:29 +0000</pubDate>
		<guid>http://climateprogress.org/2008/05/05/is-450-ppm-politically-possible-part-4-the-most-urgent-climate-policy-isnt-a-co2-price/#comment-12115</guid>
					<description>It is not surprising that generation using oil is being replaced with generation using coal. The Stern review estimates that a US$100 price for crude oil compared to the 2003 price is equivalent to a price of $196 per tonne of CO2 (p257). If the EU can build more non-CCS coal fired power plants and reduce emissions by 20% by 2020, then perhaps this cap is far too weak. If the emissions cap at present so weak enough that more coal fired plants are built which lock in more emissions or are expensive to replace at a later date then perhaps this is not optimal. If the cap in a cap and trade system was chosen correctly then there would not be a need for policies like regulations banning non CCS coal fired power. If the cap is too weak then perhaps there is merit in redundancy.

I am somewhat concerned that some of the technology policy related to CCS is 'picking winners'. By all means fund RD&#38;D in CCS technologies, but don't do so at the expense of other technologies. If CCS turns out to be significantly deployable (I personally have my doubts), then coal miners are likely to be significant beneficiaries. Some CCS RD&#38;D should be funded by a levy on coal mined.</description>
		<content:encoded><![CDATA[<p>It is not surprising that generation using oil is being replaced with generation using coal. The Stern review estimates that a US$100 price for crude oil compared to the 2003 price is equivalent to a price of $196 per tonne of CO2 (p257). If the EU can build more non-CCS coal fired power plants and reduce emissions by 20% by 2020, then perhaps this cap is far too weak. If the emissions cap at present so weak enough that more coal fired plants are built which lock in more emissions or are expensive to replace at a later date then perhaps this is not optimal. If the cap in a cap and trade system was chosen correctly then there would not be a need for policies like regulations banning non CCS coal fired power. If the cap is too weak then perhaps there is merit in redundancy.</p>
<p>I am somewhat concerned that some of the technology policy related to CCS is &#8216;picking winners&#8217;. By all means fund RD&amp;D in CCS technologies, but don&#8217;t do so at the expense of other technologies. If CCS turns out to be significantly deployable (I personally have my doubts), then coal miners are likely to be significant beneficiaries. Some CCS RD&amp;D should be funded by a levy on coal mined.</p>
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		<title>By: Thom</title>
		<link>http://climateprogress.org/2008/05/05/is-450-ppm-politically-possible-part-4-the-most-urgent-climate-policy-isnt-a-co2-price/#comment-12119</link>
		<author>Thom</author>
		<pubDate>Tue, 06 May 2008 13:26:58 +0000</pubDate>
		<guid>http://climateprogress.org/2008/05/05/is-450-ppm-politically-possible-part-4-the-most-urgent-climate-policy-isnt-a-co2-price/#comment-12119</guid>
					<description>Gee, I wonder where Shellenberger is "hearing that the cost of capture for the air capture technologies could be feasible."  Sounds like a Pielke Jr. meme.

By the way, Eli Rabett has &lt;a href="http://rabett.blogspot.com/2008/05/manchurian-senior-fellow-ethon-has-been.html" rel="nofollow"&gt;a post up noting&lt;/a&gt; that yet another Breakthrough Institute scholar has links back to a denialist think tank.

This time, it's the Marshall Institute.  Who would have ever guessed?</description>
		<content:encoded><![CDATA[<p>Gee, I wonder where Shellenberger is &#8220;hearing that the cost of capture for the air capture technologies could be feasible.&#8221;  Sounds like a Pielke Jr. meme.</p>
<p>By the way, Eli Rabett has <a href="http://rabett.blogspot.com/2008/05/manchurian-senior-fellow-ethon-has-been.html" rel="nofollow">a post up noting</a> that yet another Breakthrough Institute scholar has links back to a denialist think tank.</p>
<p>This time, it&#8217;s the Marshall Institute.  Who would have ever guessed?</p>
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		<title>By: Eli Rabett</title>
		<link>http://climateprogress.org/2008/05/05/is-450-ppm-politically-possible-part-4-the-most-urgent-climate-policy-isnt-a-co2-price/#comment-12127</link>
		<author>Eli Rabett</author>
		<pubDate>Tue, 06 May 2008 18:40:30 +0000</pubDate>
		<guid>http://climateprogress.org/2008/05/05/is-450-ppm-politically-possible-part-4-the-most-urgent-climate-policy-isnt-a-co2-price/#comment-12127</guid>
					<description>Let me add, that I think the question that Joe Romm put is the most important one, but even before that, there is the issue of whether we can immediately start down the path toward reducing emissions.   I would hate to get caught in the trap of why do anything if we can't right away get to the ideal set of actions.

For example, improving coal power plant efficiency by 20-30% with cogeneration would be something worth thinking about, especially if the plant could later be retrofitted for capture.</description>
		<content:encoded><![CDATA[<p>Let me add, that I think the question that Joe Romm put is the most important one, but even before that, there is the issue of whether we can immediately start down the path toward reducing emissions.   I would hate to get caught in the trap of why do anything if we can&#8217;t right away get to the ideal set of actions.</p>
<p>For example, improving coal power plant efficiency by 20-30% with cogeneration would be something worth thinking about, especially if the plant could later be retrofitted for capture.</p>
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		<title>By: Kirk Sorensen</title>
		<link>http://climateprogress.org/2008/05/05/is-450-ppm-politically-possible-part-4-the-most-urgent-climate-policy-isnt-a-co2-price/#comment-12131</link>
		<author>Kirk Sorensen</author>
		<pubDate>Tue, 06 May 2008 19:24:18 +0000</pubDate>
		<guid>http://climateprogress.org/2008/05/05/is-450-ppm-politically-possible-part-4-the-most-urgent-climate-policy-isnt-a-co2-price/#comment-12131</guid>
					<description>&lt;i&gt;For example, improving coal power plant efficiency by 20-30% with cogeneration would be something worth thinking about, especially if the plant could later be retrofitted for capture.&lt;/i&gt;

How would this work?  Would you move whole towns right next to the coal plant so that they could use waste heat from the plant for hot water and home heating?

With the added benefit that they could breathe the filth of the coal plant up-close-and-personal.</description>
		<content:encoded><![CDATA[<p><i>For example, improving coal power plant efficiency by 20-30% with cogeneration would be something worth thinking about, especially if the plant could later be retrofitted for capture.</i></p>
<p>How would this work?  Would you move whole towns right next to the coal plant so that they could use waste heat from the plant for hot water and home heating?</p>
<p>With the added benefit that they could breathe the filth of the coal plant up-close-and-personal.</p>
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		<title>By: Paul K</title>
		<link>http://climateprogress.org/2008/05/05/is-450-ppm-politically-possible-part-4-the-most-urgent-climate-policy-isnt-a-co2-price/#comment-12134</link>
		<author>Paul K</author>
		<pubDate>Tue, 06 May 2008 19:42:39 +0000</pubDate>
		<guid>http://climateprogress.org/2008/05/05/is-450-ppm-politically-possible-part-4-the-most-urgent-climate-policy-isnt-a-co2-price/#comment-12134</guid>
					<description>Joe,
I'm actually glad to hear 450 ppm is not tied directly to the worst case scenario, but is, apparently also necessary for the midrange IPCC 3C warming. I still think it is politically impossible to get a global moratorium of new coal plants. It is highly unlikely in the U.S. in any time soon. The improbability of a moratorium, oddly enough, strengthens your call for maximized deployment. How many wedges does it take to replace the energy  produced by coal? Can CSP do it alone?</description>
		<content:encoded><![CDATA[<p>Joe,<br />
I&#8217;m actually glad to hear 450 ppm is not tied directly to the worst case scenario, but is, apparently also necessary for the midrange IPCC 3C warming. I still think it is politically impossible to get a global moratorium of new coal plants. It is highly unlikely in the U.S. in any time soon. The improbability of a moratorium, oddly enough, strengthens your call for maximized deployment. How many wedges does it take to replace the energy  produced by coal? Can CSP do it alone?</p>
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		<title>By: Kirk Sorensen</title>
		<link>http://climateprogress.org/2008/05/05/is-450-ppm-politically-possible-part-4-the-most-urgent-climate-policy-isnt-a-co2-price/#comment-12137</link>
		<author>Kirk Sorensen</author>
		<pubDate>Tue, 06 May 2008 20:16:11 +0000</pubDate>
		<guid>http://climateprogress.org/2008/05/05/is-450-ppm-politically-possible-part-4-the-most-urgent-climate-policy-isnt-a-co2-price/#comment-12137</guid>
					<description>Can CSP stop coal alone?  First of all, CSP would have to be baseload, and it's not, at least not without super-TES.

Next you have to build the HVDC network to get the juice from all the CSP plants in the Southwest to the rest of the country where the people are.  That's not going to be cheap or easy.  People hate transmission lines.

All said, however, I would greatly favor a ban on new coal plants.  Worldwide would be even better, but I'd settle for just the US.</description>
		<content:encoded><![CDATA[<p>Can CSP stop coal alone?  First of all, CSP would have to be baseload, and it&#8217;s not, at least not without super-TES.</p>
<p>Next you have to build the HVDC network to get the juice from all the CSP plants in the Southwest to the rest of the country where the people are.  That&#8217;s not going to be cheap or easy.  People hate transmission lines.</p>
<p>All said, however, I would greatly favor a ban on new coal plants.  Worldwide would be even better, but I&#8217;d settle for just the US.</p>
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		<title>By: Eli Rabett</title>
		<link>http://climateprogress.org/2008/05/05/is-450-ppm-politically-possible-part-4-the-most-urgent-climate-policy-isnt-a-co2-price/#comment-12143</link>
		<author>Eli Rabett</author>
		<pubDate>Tue, 06 May 2008 21:02:45 +0000</pubDate>
		<guid>http://climateprogress.org/2008/05/05/is-450-ppm-politically-possible-part-4-the-most-urgent-climate-policy-isnt-a-co2-price/#comment-12143</guid>
					<description>Kirk, a lot of heat is used for industrial processing.  Of course, all the industry is in China now. . . .</description>
		<content:encoded><![CDATA[<p>Kirk, a lot of heat is used for industrial processing.  Of course, all the industry is in China now. . . .</p>
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		<title>By: Kirk Sorensen</title>
		<link>http://climateprogress.org/2008/05/05/is-450-ppm-politically-possible-part-4-the-most-urgent-climate-policy-isnt-a-co2-price/#comment-12145</link>
		<author>Kirk Sorensen</author>
		<pubDate>Tue, 06 May 2008 21:05:30 +0000</pubDate>
		<guid>http://climateprogress.org/2008/05/05/is-450-ppm-politically-possible-part-4-the-most-urgent-climate-policy-isnt-a-co2-price/#comment-12145</guid>
					<description>Not the low-grade heat you're talking about using through cogeneration.  There's a reason it's called "waste heat"...because it's hardly good for anything.  The only way to use it is to literally live right next door to it, because its value is so low that transporting it loses whatever it's worth.</description>
		<content:encoded><![CDATA[<p>Not the low-grade heat you&#8217;re talking about using through cogeneration.  There&#8217;s a reason it&#8217;s called &#8220;waste heat&#8221;&#8230;because it&#8217;s hardly good for anything.  The only way to use it is to literally live right next door to it, because its value is so low that transporting it loses whatever it&#8217;s worth.</p>
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		<title>By: hapa</title>
		<link>http://climateprogress.org/2008/05/05/is-450-ppm-politically-possible-part-4-the-most-urgent-climate-policy-isnt-a-co2-price/#comment-12149</link>
		<author>hapa</author>
		<pubDate>Tue, 06 May 2008 21:58:37 +0000</pubDate>
		<guid>http://climateprogress.org/2008/05/05/is-450-ppm-politically-possible-part-4-the-most-urgent-climate-policy-isnt-a-co2-price/#comment-12149</guid>
					<description>looks like coal's heading past 4 wedges now with china making up all the growth. the answer to that is no one wedge. combinations of small solar (PV and home thermal), big wind, and vehicle, building, and process efficiency, can cover that in the short term, if we don't try to fossil-fuel our way out of the money mess.</description>
		<content:encoded><![CDATA[<p>looks like coal&#8217;s heading past 4 wedges now with china making up all the growth. the answer to that is no one wedge. combinations of small solar (PV and home thermal), big wind, and vehicle, building, and process efficiency, can cover that in the short term, if we don&#8217;t try to fossil-fuel our way out of the money mess.</p>
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		<title>By: Michael Shellenberger</title>
		<link>http://climateprogress.org/2008/05/05/is-450-ppm-politically-possible-part-4-the-most-urgent-climate-policy-isnt-a-co2-price/#comment-12191</link>
		<author>Michael Shellenberger</author>
		<pubDate>Wed, 07 May 2008 18:47:55 +0000</pubDate>
		<guid>http://climateprogress.org/2008/05/05/is-450-ppm-politically-possible-part-4-the-most-urgent-climate-policy-isnt-a-co2-price/#comment-12191</guid>
					<description>The fact that Roger and I are interested in air capture doesn't mean we're advocates of it. Air capture is a technology that we should take seriously. 

In a recent post, Roger lays out some concerns about it, arguing that bio-char may be more cost effective and easy to implement:

http://thebreakthrough.org/blog/2008/05/elements_of_any_successful_app.shtml#more</description>
		<content:encoded><![CDATA[<p>The fact that Roger and I are interested in air capture doesn&#8217;t mean we&#8217;re advocates of it. Air capture is a technology that we should take seriously. </p>
<p>In a recent post, Roger lays out some concerns about it, arguing that bio-char may be more cost effective and easy to implement:</p>
<p><a href="http://thebreakthrough.org/blog/2008/05/elements_of_any_successful_app.shtml#more" rel="nofollow">http://thebreakthrough.org/<span style="font-size: 1px;"> </span>blog/<span style="font-size: 1px;"> </span>2008/<span style="font-size: 1px;"> </span>05/<span style="font-size: 1px;"> </span>elements_of_any_successful_app.shtml#more</a></p>
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		<title>By: Eli Rabett</title>
		<link>http://climateprogress.org/2008/05/05/is-450-ppm-politically-possible-part-4-the-most-urgent-climate-policy-isnt-a-co2-price/#comment-12216</link>
		<author>Eli Rabett</author>
		<pubDate>Thu, 08 May 2008 03:56:23 +0000</pubDate>
		<guid>http://climateprogress.org/2008/05/05/is-450-ppm-politically-possible-part-4-the-most-urgent-climate-policy-isnt-a-co2-price/#comment-12216</guid>
					<description>Air capture is the &lt;a href="http://www.scamorama.com/mallory-head2.html" rel="nofollow"&gt; Nigerian scam letter&lt;/a&gt; of climate policy and about the last thing to invest anything but the buck you buy the odd lottery ticket with.  As Joe and others said anyone who understands about entropy knows that you want to extract CO2 from places where it is a lot more concentrated.  This leaves us with the question of why would anyone push this obvious loser.

There is a simple answer, CO2 capture at the source (fossil fuel power plants, cement kilns) imposes a cost on the fossil fuel industry.  Air capture is another Treasury raid (as well as silly, work out the energy and materials cost).</description>
		<content:encoded><![CDATA[<p>Air capture is the <a href="http://www.scamorama.com/mallory-head2.html" rel="nofollow"> Nigerian scam letter</a> of climate policy and about the last thing to invest anything but the buck you buy the odd lottery ticket with.  As Joe and others said anyone who understands about entropy knows that you want to extract CO2 from places where it is a lot more concentrated.  This leaves us with the question of why would anyone push this obvious loser.</p>
<p>There is a simple answer, CO2 capture at the source (fossil fuel power plants, cement kilns) imposes a cost on the fossil fuel industry.  Air capture is another Treasury raid (as well as silly, work out the energy and materials cost).</p>
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		<title>By: Eli Rabett</title>
		<link>http://climateprogress.org/2008/05/05/is-450-ppm-politically-possible-part-4-the-most-urgent-climate-policy-isnt-a-co2-price/#comment-12218</link>
		<author>Eli Rabett</author>
		<pubDate>Thu, 08 May 2008 05:00:19 +0000</pubDate>
		<guid>http://climateprogress.org/2008/05/05/is-450-ppm-politically-possible-part-4-the-most-urgent-climate-policy-isnt-a-co2-price/#comment-12218</guid>
					<description>Sorry to double post, but it struck me that without worrying whether air capture was feasible, if you postulate that it is, by definition capture at power plants is easier hand you get a zillion wedges.  Air capture as a policy objective is either silly, or unnecessary.  Pick one. (and yes I know about cars)</description>
		<content:encoded><![CDATA[<p>Sorry to double post, but it struck me that without worrying whether air capture was feasible, if you postulate that it is, by definition capture at power plants is easier hand you get a zillion wedges.  Air capture as a policy objective is either silly, or unnecessary.  Pick one. (and yes I know about cars)</p>
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