"The climatic impacts of releasing fossil fuel CO2 to the atmosphere will last longer than Stonehenge, longer than time capsules, longer than nuclear waste, far longer than the age of human civilization so far." David Archer
Andrew C. Revkin at DotEarth pulls together the science and the attitude about carbon dioxide with reference to this artwork:Marc Roberts’ latest “Throbgoblins” blogtoon (click to enlarge).
And then there's methane...see NYTimes article by Elisabeth Rosenthal, As More Eat Meat, A Bid To Cut Emissions.
Pigs, and Cows, and Chickens... OH MY....