The Solar Impulse landed in New York late Saturday, finishing a historic, 3,500-mile stop-and-start journey across the U.S.
The deadly accident in Lac-Megantic has some people arguing that pipelines are safer than rail for transporting oil. The argument misses the point.
Stella is a solar-powered prototype car with a range of 270 miles, room for four plus luggage -- and a steering wheel that swells and shrinks.
In the Thames Estuary, 175 turbines are providing enough electricity to power nearly 500,000 homes.
American farmers can now start growing humongous 20-foot-tall grasses to produce biofuel under a federal clean energy program.
Pepsi still contains caramel coloring that has been shown to cause cancer in rats, more than a year after it promised a national phaseout.
El Niño events appear to have become more commonplace as the globe has warmed, a new study finds. Meanwhile, another study could make El Niños easier to predict.
Surplus power from wind turbines could be stored in underground porous rocks produced by volcanic eruptions, say scientists in the Northwest.
Allergy doctors across the country report an uptick in patient visits, and scientists are straightforward about the climate connection.