To prevent our air from being "fouled" by trace amounts of natural, harmless atmospheric gas, why not dump buckets of animal excrement in the street?

U.N.'s Ban urges climate deal, short of perfect | Reuters

Speaking on behalf of Africa, Ethiopian Prime Minister Meles Zenawi said he was "deeply dismayed" by the loss of momentum since Copenhagen. "Every day of delay is being paid for by the lives of countless numbers of Africans," he said.

About 1,500 people marched in Cancun in protest the low ambitions of the talks and dumped buckets of animal excrement in the street. Overnight, some protesters threw eggs at riot police and defaced a fast-food restaurant.