Clean energy making gains, but not yet breakthroughs

04/11/2013 | Smart Grid News

Clean-energy technologies are making real advances, but the gains are sometimes overstated, writes Doug Peeples. This article looks at four recent hopeful -- but still problematic -- developments, including a metal-air electric-vehicle battery with a 2,000-mile range; a way to extract hydrogen directly from plants; a solar electric van; and a bladeless wind turbine.

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