A German engineer wants to turn an old mine, half a mile underground, into a giant battery.
A new study examines the potential hazards of natural gas extraction.
With a $5 billion battery factory on the line, Republican lawmakers in four states vie to prove they're the fairest of them all.
SolarCity continues its drive to make installing solar panels the easiest green thing you ever did, by letting customers sign up while running errands.
Climate change is making spring happen earlier, and bringing wildflowers along with it.
Step inside the project that could be the key to Obama’s climate legacy … or a multibillion-dollar boondoggle.
Piles of fake snow at the Olympics are the latest sign of an industry on the brink.
There's still a lot POTUS can do.
Here's why the state of Nebraska thinks the newly published power plant emissions regulations are illegal.