The automaker tries again, announcing an electric-drive system that can be paired with gasoline generators or fuel cells.
Congress ends without funding research programs, as the United States falls behind in alternative technologies.
To prevent massive pollution and slow its growing contribution to global warming, China will need to make advanced coal technology work on an unprecedented scale.
In a few years, China will be the world's largest emitter of carbon dioxide. Don't look for any quick and easy solution to the problem.
As its 20th anniversary approaches, what can the landmark agreement on controlling CFCs teach those who want to control greenhouse gases?
Photovoltaic power plants to produce 10 times as much electricity
Get ready to throw away your light bulbs
GE's solid-oxide cell could be an energy breakthrough
Biowaste to fuels, cars that plug in, lithium-ion batteries that don't explode, and cheap energy from the sun.
Researchers are developing new methods for cultivating a plant called jatropha.