Ken Ilgunas wanted to learn more about the controversial pipeline. So he strapped on a pair of hiking boots and hit the trail.
The wind industry survived the fiscal cliff. But it ain’t out of the woods yet.
Climate Desk looks back at the hottest year on record.
Students across the country are calling for colleges to divest from fossil fuels. But will the schools listen?
Navigation has become treacherous as the worst US drought in half a century brings water levels close to record lows.