The EPA is expected to let states decide how to clean up their power industries.
Because like it or not, the EPA is about to crack down on the nation’s biggest source of carbon pollution.
Despite its success with renewable energy, Germany is still struggling to kick its dirtiest habit.
A German engineer wants to turn an old mine, half a mile underground, into a giant battery.
Step inside the project that could be the key to Obama’s climate legacy… or a multibillion-dollar boondoggle.