Renewable energy is energy that is collected from renewable resources, which are naturally replenished on a human timescale, such as sunlight, wind, rain, tides, waves, and geothermal heat.
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Renewable energy often provides energy in four important areas: electricity generation, air and water heating/cooling, transportation, and rural (off-grid) energy services.
https://en.wikipedia.org/wiki/Renewable_energy
https://www.renewableenergyworld.com/2009/09/25/is-wastetoenergy-renewable/#gref
https://www.nrdc.org/stories/renewable-energy-clean-facts