As another U.N. climate change summit goes on in Doha, a new study of carbon dioxide in the atmosphere says current levels nearly guarantee a nearly four-degree increase in global temperatures.
President Obama signed a bill this week protecting U.S. airlines from an emission tax when they fly in and out of Europe. The EU's carbon tax is so unpopular, it's been suspended for all carriers for a year.
BBC World Service
As the Kyoto Protocol nears its expiry, leaders from around the world will come together in for the United Nations yearly climate talks to discuss a new global deal to limit greenhouse gas emissions.
Food and Drink
Cranberry growers in Massachusetts are starting to look elsewhere to farm as a warming climate makes managing bogs more expensive and interferes with the maturing of berries.
Global food prices are expected to rise in the long term as population grows, but a new study warns that severe weather events like this year's drought in the U.S. could spike prices higher suddenly.
Three days of extreme heat in Chicago in 1995 caused over 700 deaths. New York University professor Eric Klinenberg talks about what we've learned from that catastrophe.
Yvo deBoer, co-writer of the original Kyoto Protocol, talks about the Rio+20 Earth Summit, how climate change is being perceived in the global community, and names a surprising country that's making the best sustainable efforts right now.