Joule Biotechnologies has completed its second round of funding.
Illumitex's new optical design makes LEDs brighter and more energy efficient.
A preliminary analysis suggests that natural gas could contribute far more to global warming than previously thought.
The decision could be key to consumer acceptance.
1366 Technologies demonstrates its efficient process for making solar cell wafers.
There is intense optimism that the country can become the "cradle of clean energy."
A report suggests that the U.S. is losing its edge in the clean energy market.
Sun-powered "SolarPumps" help concertgoers keep phones, laptops and even scooters charged up.
Rare earth minerals are key to advanced technology, but almost all come from China.
Surprisingly, it works better than conventional energy-efficiency programs.