Yvon Chouinard aligns his company with the environment -- and Walmart.

Does the finding make wind energy less appealing?

President seeks to draw a distinction from Mitt Romney's denial of climate science.

Reservoirs are already dangerously low.

Blunders and environmental issues hamstring the country’s efforts to dig up fuel fast enough.

Having barely launched its first car, Coda raises its sights.

Is dedication to healthy produce degrading America's salad bowl?

Buying electric and hybrid cars gets even more normal.

Do certified-sustainable labels mean anything other than confusion?

Rural Indians get cash from a machine that uses no grid power.