Stock Photo - Solar cell panels of energy provider ENNI stand in front of an old windmill in Moers, Germany, 30 September 2013. The solar park with its 14,000 solar cell panels is supposed to produce 3.3 million kilowatt-hours of electricity per annum. Photo: ROLAND WEIHRAUCH | usage worldwide. - Moers/North Rhine-Westphalia/Germany

Stock Photo: Solar cell panels of energy provider ENNI stand in front of an old windmill in Moers, Germany, 30 September 2013. The solar park with its 14.

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