The ocean is actually far from acidic.

But it is acidifying. This is the proper term, just as we frequently say “temperatures will begin warming tomorrow” even if the change is from -20F to -15F.

It is a fact that CO2 can’t be a corrosive agent when the PH is above 7.

Nobody claims CO2, per se, is a corrosive agent itself regardless of PH. Go read the link provided by Bob Wright.

Other ancillary benefits of train travel are
1. train stations are in the middle of the city so you generally arrive a lot closer to your destination
2. you can check in 5 mins before departure and
3. no ridiculous security restrictions (you can bring liquids on board!)

Do a little more reading. What is happening with increasing CO2 dissolved in the oceans is increased carbonic acid concentration, and decreased pH, decreased carbonate ion and decreased aragonite (a CaCO3 crystal phase) saturation. This makes it harder for sea life that makes CaCO3 shells and body structures to make them, and at a certain pH these shells will “corrode”. A good primer:

http://coralreefwatch.noaa.gov/ satellite/ oa/ description/ oaps_intro_oa.html

Scientists measure acidity by the “pH” scale familiar to every high school chemistry student. Since 1800, ice core measures show the ocean’s average pH level has dropped from 8.2 to 8.1, making it 30% more corrosive, Feely says. Expected emissions will likely drop it to a pH of 7.9 this century, a 150% increase in acidity since 1800, he says.

From the article above.

Ocean acidification, a direct result of increased CO2 emission, is set to change the Earth’s marine ecosystems forever and may have a direct impact on our economy, resulting in substantial revenue declines and job losses.

Intensive fossil-fuel burning and deforestation over the last two centuries have increased atmospheric CO2 levels by almost 40%, which has in turn fundamentally altered ocean chemistry by acidifying surface waters. Fish levels and other sea organisms such as planktons, crabs, lobsters, shrimp and corals are expected to suffer, which could leave fishing communities at the brink of economic disaster.

The ocean is actually far from acidic. \\

“The term “ocean acidification” relates to the decrease in pH and does not imply that the pH of ocean surface waters will become acid (below 7.0) any time soon. ”

http://www.eoearth.org/article/Ocean_acidification

Airborn sources of CO@ are only a smaller part of increasing CO2 levels.

The ocean is not only far from acidic. It is a fact that CO2 can’t be a corrosive agent when the PH is above 7.

It’s great. 2.5 hours Madrid to Seville, much faster than driving, and unlike the airplane you can see stuff on the way, not to mention it’s relaxing and comfortable.