Livestock, timber and off-road industry groups filed a lawsuit in federal court on Aug. 13 challenging the Obama administration’s 2012 planning rule for U.S. national forests.

Former New York Gov. Eliot Spitzer advocates for a tax on carbon-spewing companies, an approach to climate action steeped in conservative economics.

Neighbors recall promises that the eerie azure lake known as "Little Blue" would be made into a recreational jewel, complete with swimming, bike trails, and sailboats.

July was the hottest month on record in the United States, perhaps due to a combination of global warming and a widespread drought, experts say. The lower 48 U.S. states experienced an average July temperature of 77.6 degrees Fahrenheit (25.3 degrees Celsius).

The last couple of years have certainly felt unusually hot in many parts of the U.S., but are they really all that unusual?

A new study says the chance of a drought in Texas is 20 times more likely during a La Niña year now compared with the 1960s. Another predicts 4 feet of sea level rise along the Eastern Seaboard over the next century. Have your eyes glazed over yet?

Dire fire conditions, like the inferno of heat, turbulence, and fuel that recently turned 346 homes in Colorado Springs to ash, are now common in the West. A lethal combination of drought, insect plagues, windstorms, and legions of dead, dying, or stressed-out trees constitute what some pundits are calling wildfire’s “perfect storm.”

A recent outbreak of the deadly Ebola virus in Uganda highlights the many unknowns of the highly contagious fever, experts say.

Onondaga Lake in Syracuse, N.Y., has often been called the most polluted lake in America. It was hammered by a one-two punch: raw and partially treated sewage from the city and its suburbs, and a century's worth of industrial dumping. But now the final stage in a $1 billion cleanup is about to begin.

There have been two, maybe three, landmark heat waves in the history of man-made global warming. The first was in 1988. Then as now, the eastern two-thirds of the United States was broiling while relentless drought parched soil and withered crops across the Midwest. But in Washington, the underlying problem was being named for the first time. On June 23, NASA scientist James Hansen testified to the Senate that man-made global warming had begun. The New York Times reported his remarks on Page 1, and the rest of the media at home and abroad followed suit. By year’s end, “global warming” had become a common phrase in news bureaus, government ministries and living rooms around the world.