Geothermal energy or solar power?

You think the Nevada desert, you think solar power. But that's not the case at Pahrump Valley High School, about 50 miles west of Las Vegas. 

The school, scheduled to open in 2012, is being built with a geothermal heat pump (GHP).

'Eco' lights could cause cancer

LEDs are one of the few types of lighting that actually give you enough light to see by, while still being good for the environment... or maybe not.

Is Obama clueless about electric cars?

President Obama's moon shot - a Kennedyesque call to have 1 million plug-in electric vehicles (EVs) on U.S. roads by 2015 - is certainly bold and welcome, but most likely out of reach.

Air Force ups wave power efficiency to 99 percent

Air Force researchers say they've managed to harness more than 99 percent of wave energy.

This micro-grid offers net zero energy efficiency

Net zero energy efficiency at "an unprecedented rate of affordability?" Well, that's what the first private commercial micro-grid project of its kind in California, known as 2500 R Street, promises to deliver. 

New engine design halves fuel consumption - using nothing but air

A Swedish team has developed a technology that it says could halve fuel consumption by using the energy generated as a vehicle brakes.

Chevy to weatherize Maine homes?

Is it penance for all those old Chevrolet/GM gas-guzzlers still on the road? Forward-looking environmental stewardship? Basic good-neighborliness?

 A combination of all three?

Volvo to showcase diesel plug-in hybrid

A diesel hybrid - now that's something kind of different. And, hey, why not make it a plug-in? 

EV charging stations hit Vegas Strip

There will come a day when an electric vehicle (EV) charging station going in anywhere - save, perhaps, the moon or Mars - won't be news. 

But we're obviously not there yet.

2010 drought could presage end of Amazon carbon sink

Two 'once-in-a-century' droughts have hit the Amazon rainforest in just five years, scientists say, removing the region's ability to act as a carbon sink.

Sunlight-to-hydrogen system demonstrated

Researchers at the Department of Energy's Oak Ridge National Laboratory have successfully demonstrated a biohybrid photoconversion system that can convert visible light into hydrogen fuel.

Solar EV charging station feeds grid

A frequent criticism of electric vehicles (EVs) is that they're really powered by coal, since that's such a significant source of electricity.

Solar carport does disaster relief duty

Disaster-stricken areas often need more than temporary structures for secure housing. They need power, too, for cooking, and for pumping and purifying water, and to help provide medical services.

This micro-cycle is way cooler than a Segway

At first glance, the RYNO Motors Micro-Cycle looks like something that could only exist in Portlandia, the hilarious send-up on Portland, Ore., from Fred Armisen and Carrie Brownstein.

Hydrogen cars come closer to reality

A British start-up says it's found a cheap, practical way of storing hydrogen, making it a viable alternative to gasoline in cars.

Ben & Jerry's becomes biofuel source

Milk, cream, proteins, syrups and pieces of fruit - all are are part of the waste stream of ice-cream factories, and soon, at a Ben and Jerry's factory in the Netherlands, they'll all help to produce green power.

Obama wants one million EVs by 2015

In a State of the Union address packed with nods to cleantech, President Obama's call for the United States to become the first nation with one million electric vehicles on the road - and to do it by 2015 - could easily have been heard and then forgotten.

North Atlantic water warmest in 2,000 years

The water flowing from the North Atlantic into the Arctic Ocean is the warmest it's been in 2,000 years, say scientists.

Meet Manta, the amphibious electric vehicle

City 2046. Art, life and ingenuity. These were the themes for the ninth annual Michelin Design Challenge, an international automotive design competition for individual designers, teams, studios, and companies.

House monitors residents' health

It's a little on the bijou side - but a research team has created an energy-efficient dolls' house which can send alerts if its residents are ill.