The world's biggest polluter will set up a carbon market as early as 2016. Here's why that matters.
Even if we slash greenhouse gases immediately, the dangerous effects of global warming will continue for centuries to come.
California's historic drought is forcing once-squeamish Californians to take a new look at “toilet-to-tap” water reuse.
Food giant General Mills now has some pretty sweet climate bragging rights.
Lisa Jackson on Apple's wide-ranging plan to green its act.
You've seen their logos on the sidelines, now get a peak inside the company trying to transform the world.
The latest addition to Australia's climate circus? Al Gore.
Even with the fracking boom, the U.S. is still tied to global oil markets.
The EPA is rolling out an ambitious plan to slash greenhouse gas emissions from power plants.
We've devised the world's shortest survey to find out what kind of actions our readers are taking. You know you want to.