Biochar from algae can give fossil coal a run for its money.

1,500 Farmers in India Commit Suicide: A Wake-Up Call for Humanity
http://www.huffingtonpost.com/ mallika-chopra/ 1500-farmers-in-india-com_b_187457.html

While researching more for this article, I learned that this latest tragedy bears an uncomfortable resemblance to the problem in Australia’s agricultural sector, where many of the country’s farmers are committing suicide in response to the severe droughts, heat waves and wildlife fires that have been ravaging the country for the last several years. It is estimated that one Australian farmer commits suicide every four days. The severe weather changes are a direct manifestation of global warming.

To bury the biochar requires, in addition, less than $8 per tonne plus transportation costs.

Just wnated to mention that the conversion to $ per tonne CO2 is backwards; oought to be $246 per tonne CO2.

Note that 1% of GWP is about $670 billion per year. With that sum yearly I could remove lots of excess carbon from the active carbon cycle. Since the yearly emissions are about 10 GtC, I’ll have to do it for $67 per tonne of carbon removed; $18.3 per tonne of CO2; just on the edge of what is doable.

How? One way is to grow algae (in sunny places, say deserts) in tanks at 40 tC/ha/yr. This would require a quarter gigahectare, about a quarter of the Sahara Desert, for example. Pyrolysize the algae into biochar and bury the biochar.

Interesting article you link to. I liked this statement:

“Each country, it argues, should be entitled to a share of that total amount that is proportional to its population over the period. By this measure, countries that began emitting early, such as the UK, have by now already used up more than their share. ”

Does that mean that everyone in the UK will have to emigrate? There will just be a faint whistling sound of tumbleweed blowing up the Mall…

http://www.youtube.com/watch?v=_7h08RDYA5E

(Warning: Viewing the above video could lead to exploding head syndrome.)

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Roger Pielke (Sr.?) says sucking CO2 out of the atmosphere is an economical solution:

http://environmentalresearchweb.org/cws/article/futures/38721

The issue is this: how much carbon dioxide should each person on Earth be “allowed” to emit?

Put another way: if emissions of CO2 and other greenhouse gases are to be limited, at some target date, to a figure that science suggests can stave off “dangerous” climate change, then how does that figure break down at the personal level, when shared out among the world’s citizens?