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Doubling the efficiency of solar devices would completely change the economics of renewable energy. Here is a design that just might make it possible.
A high-power circuit breaker could finally make DC power grids practical.
MIT chemists devise a reaction that traps carbon dioxide and turns it into something useful.
An inexpensive, polymer-based device breaks a record, reaching 10.6 percent efficiency.
A material described in Nature could help lead the way to high-efficiency, inexpensive solar cells.
A Caltech researcher thinks arrays of tiny wind turbines could produce cheaper power than big ones.
Falling costs are making fuel-cell vehicles look like a plausible alternative to conventional cars.
New direct-drive turbines promise to lower the cost of offshore wind energy.
Both Siemens and GE bet on direct-drive generators.
Solar manufacturers like Suntech are struggling. Hundreds need to die for the industry to recover.