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A pilot plant at a winery not only generates electricity, it heats the water.
Underwater turbines could harness a massive amount of energy—but could cause problems for boat navigation.
The U.S. has plenty of the metals that are critical to many green-energy technologies, but engineering and R&D expertise have moved overseas.
Four cities pledge to better manage overall energy use and cut greenhouse emissions.
Chinese photovoltaic giant Suntech looks to electronics to help squeeze more power out of solar arrays.
A new polymer film protects panels from water so they can last for decades.
Nanomaterials could help solar cells convert more sunlight into electricity than once thought possible.
New legislation might slow green technology investment, but other laws could help pick up the slack.
A startup’s polymer sticker increases power output by 10 percent, and can be applied to panels that are already installed.