You've probably noticed the term "clean coal" bandied about a lot lately. It's a great-sounding phrase, evoking images of plentiful, cheap energy generated by squeaky-clean power plants emitting a thin wisp of smoke that smells like a cross between...

Cool Earth’s inflated solar concentrators may be the lightest power plants around. Looking like a biggie version of those shiny helium balloons you might see at someone's birthday party, the concentrators weigh just 20 pounds and, tethered to lightweight...

Never mind that this solar-powered car looks like a streamlined humpback whale covered with high-tech barnacles. The SolarWorld No.1 can hit a top speed of 75mph, and averaged 45mph over an 1864-mile race course without once stopping at a...

As goofy concepts from Japan go, this solar-powered bra is a pretty good contender for most ridiculous we've seen. Since it means well, though — promoting eco-friendly initiatives — we won't point out how weird it is, as it'll...