By Hillary Rosner
Posted 06.11.2009 at 12:21 am 4 Comments
The Big Picture: Conventional hydroelectric power (think of the Hoover Dam) provides 7 percent of the electricity in the U.S. But the only way to increase that number without damming more rivers — which causes widespread ecological damage both above and below the dam — is to use nonconventional hydropower sources that capture energy from the movement of waves, rivers and tides.
Where We Are: 31 GW What We Need by 2025: 67 GW Tech to Watch: Hydrokinetic Power
Harnessing the terawatts of energy we get from the sun
By David Roberts
Posted 06.11.2009 at 12:10 am 4 Comments
The Big Picture: "Solar power" no longer refers just to chunky photovoltaic panels. A variety of tools for turning sunlight into usable energy — thin-film solar, solar thermal, solar heating, and more — are undergoing a burst of technological acceleration. Whether it's powering an entire housing development or simply heating your house, taken together, their potential is huge
Five amazing, clean technologies that will set us free, in this month's energy-focused issue. Also: how to build a better bomb detector, the robotic toys that are raising your children, a human catapult, the world's smallest arcade, and much more.