There seems to be a long-standing myth, kept alive, I suppose, by climate change deniers, that wind turbines consume more energy during their manufacture and construction than they generate. I found a report here which would seem to explode this as myth: http://www.wind-works.org/cms/index...s]=522&cHash=f5b25854fe0cfad9934aef182edab838 Some apparently good data here on real energetic payback.