![](http://www.alamy.com/thumbs/6/5C6E8CAA-B7D5-4204-8540-493A8A8D1429/R579PK.jpg)
solar cells
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Photo credit: © breitformat / Alamy / Afripics
License: Royalty Free
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Keywords: alternative, cells, electric, electricity, energy, enviroment, environment, environmental, generation, power, protection, solar, ökostrom