As the Arctic melts, the ground may release half again as much carbon dioxide as humans have created through fossil-fuel burning in the past few hundred years.
This winter has featured unusually cold and snowy conditions in the Lower-48 states, with much milder than average conditions in the Arctic.
The U.S. aims to be a leader in advanced technology cars, but a new analysis says building them isn't the only hold-up to reducing vehicle emissions.
Three new studies provide evidence of a warming climate.
A new study suggests the sun-climate connection is more complex than we thought — but it's too early to tell if the results will hold up.
The late Stephen Schneider take questions from climate skeptics; New study finds link between phytoplankton blooms and declining Arctic sea ice.
The extreme weather events we are seeing today, such as flooding in Pakistan and the Russian heat wave, are theoretically possible with or without climate change. But climate change greatly increases the odds that extreme events will occur.