In his big climate speech, Obama says the Keystone XL pipeline won't be in the nation's interest if it markedly worsens climate pollution.
We've got details on the president's climate action plan, which he unveiled in a speech on Tuesday. The big move: clamping down on coal power plants.
Gay-rights activist Dan Savage compares climate deniers to gay men in the early '80s who refused to face up to the reality of AIDS.
The president is gearing up for a big speech in which he'll unveil his second-term climate plan. The centerpiece: cracking down on coal power plants.
Climate change "is the global threat of our time," Obama said in a big speech at the Brandenburg Gate. Fitting, as the weather in Berlin was an unseasonably hot 92 degrees.
The world population is projected to soar from 7.2 billion today to 8.1 billion in 2025, so you can stop worrying about a shortage of babies.
Southern California Edison is officially giving up on the perpetually troubled San Onofre nuclear power plant. Anti-nuke activists are psyched.
TransCanada and Alberta hope former Kerry staffers will help convince the secretary of state that Keystone XL deserves a thumbs-up.
The Obama administration has been procrastinating its decision on Keystone XL for years -- and now it may kick the can even further down the road.