I don't know how much electricity Spain produced from wind farms, but every EU country has committed to producing 10% of its electricity from "renewable" sources (wind, wave, solar, etc) by, I think, 2020. The trouble with wind, of course, is that (obviously!) it's not always windy, so you can't use it for your "base load" generation capacity. Nuclear power really is the only large-scale power-generation technology that doesn't emit greenhouse gases, unless you happen to be in one of the relatively few places that can use hydroelectric or geothermal generation.
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