I stumble across those articles and blogs about "green" energy you may find interesting. In the end, you cannot hide the truth. If the Energy density is lower than the best technologies we have, like nuclear, it is not worth pursuing.
Economic impacts from the promotion of renewable energies: the German experience
In the end, Germany’s PV promotion has become a subsidization regime that, on a per-worker basis, has reached a level that far exceeds average wages, with per-worker subsidies as high as 175,000 € (US $ 240,000).
Although Germany’s promotion of renewable energies is commonly portrayed in the media as setting a “shining example in providing a harvest for the world” (The Guardian 2007), we would instead regard the country’s experience as a cautionary tale of massively expensive environmental and energy policy that is devoid of economic and environmental benefits.
Wind Tax Windfalls, Nuclear Tax Burdens
How favorably short depreciation schedules for wind have created a “gold mine” for investors, virtually independent of how much electricity the wind turbines produce.
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Michael Trebilcock - "Wind power is a complete disaster"
Industrial wind power is not a viable economic alternative to other energy conservation options. Again, the Danish experience is instructive. Its electricity generation costs are the highest in Europe (15¢/kwh compared to Ontario's current rate of about 6¢).