Climate change

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.

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.

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.

One issue we haven't heard about too much this election season is climate change. What are the candidates position on the topic and why aren't we hearing about it.

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.

Commentator Mark Bittman says industrial meat production accounts for at least one-fifth of greenhouse gas emissions.

The latest study on the unprecedented loss of ice covering the Arctic says it is 70 percent the result of human-caused climate change.

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.