A prototype hybrid quadcopter can fly several times farther than conventional battery-powered ones.
An innovative startup that blends solar energy and battery storage reflects broader interest combining the technologies.
Researchers have demonstrated a long-lasting device for making hydrogen from sunlight and water—but funding is running out.
The Indian government hopes to increase the country’s solar capacity 30-fold by 2020.
Five years after a stern warning from Bill Gates and other business leaders, U.S. funding for energy R&D remains stuck in the mud.
The Keystone XL pipeline is a distraction from what's really needed to solve climate change.
The chemical company BASF says the basic type of battery used now in hybrids could be improved tenfold, leading to cheaper electric cars.
The world’s largest and cheapest reverse-osmosis desalination plant is up and running in Israel.
The cost of solar has fallen to a point where it can compete with grid power in some places.
A report from the National Academy of Sciences says inaction on greenhouse-gas emissions makes resorting to geoengineering more likely.