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But as wind power (and its cousin, solar power) keeps expanding, it could pose some hassles and headaches for those in charge of the nation's electricity grid.
What would happen if we tried to get, say, one-third of our electricity from wind and solar? How much would that cost? Would we need to build a ton of new transmission lines to remote areas? And what would we do for back-up electricity when the wind's not blowing or the sun's not shining? Read more