"If you think about it, the use of energy in a city like New York can affect where the food is for these parents that have to try to feed their young in a warming world, " he says.

NPR: Pacific Island Cultures Brace for Climate Change

Congested roads, smog and fears about global warming have led many cities to try to change the way people move around.

ECONOMIST: Driving

This week, as delegates from more than 170 nations meet in Kyoto, Japan, to try to hammer out a new global-warming treaty, it is clear that this cautious attitude has completely turned around.

CNN: Hot Air In Kyoto