Renewable power is cheaper and safer, military leaders say.

Permanent, multistory structure erected in Providence, R.I.

Region beginning to tap seismic volatility for electricity needs.

Stripped-down "social bicycle system" takes a minimal approach to urban bike share.

But GM says $350-a-month lease deal will put electric car within reach for many.

Former Formula One engineer unveils superlight eco car.

A U.S. military base goes solar.

Atlantic coast under threat as tar balls wash up in Florida Keys.

Progressive regulations will eliminate most fast food packaging from the landfill.