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Both candidates say they support renewable energy. Romney, though, would do little to create markets for it.
Wind and solar get all the attention, but a key path to lowering emissions involves finding a less expensive way to do carbon capture.
A Caltech researcher thinks arrays of tiny wind turbines could produce cheaper power than big ones.
Tesla is set to announce a way to make recharging its electric vehicles faster than filling up a gas tank.
After shutting down its last reactor, Japan is now even more heavily dependent on imported oil, gas, and coal.