2 February 2018. Renewable energy like solar and wind power can be made from free, abundant sources: sunlight and wind. We will never run out of either, and harnessing them to make clean electricity is not that difficult today because solar power and wind power have become highly efficient and cost-competitive at producing electricity.

CLEAN TECHNICA

https://cleantechnica.com/2018/02/01/renewable-energy-made-available-resources

At industryabout.com:

Energy

 

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