Flexible, efficient solar cells will make solar power cheaper.
Japan plans to stop leaking radioactive groundwater at Fukushima with an underground wall of ice. Here's how it would work.
ARPA-E says better sensors and controls could allow automakers to cut battery size by 20 to 50 percent.
Researchers in Switzerland propose an ultra-efficient hybrid electric vehicle that runs on natural gas and diesel.
Even with a terrible recession and a natural-gas bonanza, the U.S. isn’t cutting emissions fast enough.
Five years after the last IPCC report warning about the dangers of climate change, we’re emitting more carbon dioxide than ever.
A startup says its technical advances could make fuel cells as cheap as grid power.
Computer scientists have simulated from first principles the way batteries wear out as they are charged and discharged for the first time
President Obama must focus on getting other nations to cut their emissions.
The uncertainties about climate change discussed in an upcoming report highlight the need for ways to adapt quickly.