What does the efficiency matter when the resource is free? What is more important is the capital cost and
the operating costs. I would be curious to see a citation for your claim of 1% efficiency of wind turbines.

Wiping your cell phone to hide evidence is probably grounds for charging you with Obstruction of Justice

They are already working on creating Pleistocene park using animals similar to the extinct mega-fauna herbivores.
(http://www.stanfordalumni.org/news/magazine/2008/sepoct/features/siberia.html)

The idea is that mammoths damaged the lichen and mosses of the tundra, thus allowing grass to grow, drying out the soil, preventing the permafrost from forming,

The permafrost locks up nutrients for the plants and animals and forms a high albedo surface that doesn't warm up quickly in springtime.
(http://www.abc.net.au/rn/scienceshow/stories/2011/3101365.htm#transcript)

The scape marks on the bottom of the mammoth tusks indicates that they probably scraped the snow off the grass in winter, allowing other smaller herbivores to find food and survive winter.

The change from tundra to grassland has the potential to have huge climatic effects
  and help prevent a huge release of methane (a much worse greenhouse gas than CO2).

Recreating the Pleistocene grasslands is not a silly, flippant or ill-considered idea