POTSDAM, GERMANY - MARCH 23: Demonstrators hold banner with the slogan "renewable energy transition now" while they march to demand a faster transition to renewable energy sources on March 22, 2014 in Postdam, Germany. Similar protests are being held across Germany today as Germany's drive toward covering a higher portion of its energy demands with renewables has faltered recently due to high costs and an incomplete infrastructure. (Photo by Carsten Koall/Getty Images)
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Getty Images News Carsten Koall