How do we follow the sources and sinks of CO2 on Earth? By having an orbiter...

PITTSBURGH (AP) - In a surprising turnaround, the amount of carbon dioxide being released into the atmosphere in the U.S...

International talks to address human-caused global warming began 20 years ago in Rio de Janeiro.

Our planets ocean's and plants are soaking up unexpected levels of manmade carbon dioxide, but scientists say we cannot count on nature to do so