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In Washington State, a blue-green alliance helps phase out dirty energy

People living near farms in California suffer from the neurological disorder at an alarming rate. All signs point to pesticides.

Long after everyone else has traded skis for mountain bikes, fair-weather skiers glide out in search of the perfect crust

These at-home devices will help you preserve the strength you'll need to make a gear-laden scramble as soon as the snow melts

Coal mining in Appalachia destroys more than mountains

Learning how to survive steep stuff in the Sawtooths

How big solar plants can save the planet without killing this desert tortoise

Electric cars get ready to take over the road, quietly and powerfully

In the mountains of Idaho, a group of injured war vets seek relief from wounds—some obvious, some invisible.

Institutional investors see such a bright future in solar power that they're willing to finance the panels on your rooftop