Cambridge physicist David JC Mackay ( Sustainable Energy: Without the Hot Air , online at www.withouthotair.com) offers a sobering analysis of the practicality of wind power as an alternative energy source for the UK: “Let’s compare this estimate of British wind potential with current installed wind power worldwide. The windmills that would be required to provide the UK with 20 kWh/d per person amount to 50 times the entire wind hardware of Denmark; 7 times all the wind farms of Germany; and double the entire fleet of all wind turbines in the world.
“Please don’t misunderstand me. Am I saying that we shouldn’t bother building wind farms? Not at all. I’m simply trying to convey a helpful fact, namely that if we want wind power to truly make a difference, the wind farms must cover a very large area.”
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