I'm having a problem sorting out relative efficiencies of various electricity generation methods. For example, a 1000 MW coal plant is supposed to provide enough electricity for 1 million homes (this may be high, but I don't have good numbers). The power is then about 1kW/home. But only about 1/3 of the chemical energy of coal is converted to electricity.
Wind turbines need about 3 kW/home. So the efficiency of harnessing wind to produce electricity is in the same ball park as the efficiency for coal.
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