Interesting thought - but scalability? You'd have to paint everything and keep it white....  Just read this idea about putting 10.000 windmills on the Northpole to pump water onto the ice so it will freeze in winter. But... at a cost of 750 billion US ( http://oilprice.com/Latest-Energy-News/World-News/Could-10000-Wind-Powered-Water-Pumps-Save-The-Arctic-Cap-From-Melting.html )

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Interesting thought - but scalability? You'd have to paint everything and keep it white....  Just read this idea about putting 10.000 windmills on the Northpole to pump water onto the ice so it will freeze in winter. But... at a cost of 750 billion US ( http://oilprice.com/Latest-Energy-News/World-News/Could-10000-Wind-Powered-Water-Pumps-Save-The-Arctic-Cap-From-Melting.html )