Wind and solar energy on Earth must be replaced from the Sun when expended, bringing in more heat for release of equivalent electricity into the environment, than by depleting fossil fuels. Wind and solar energy cannot ultimately be renewed from lower temperature heat from the environment, by the First (conservation) and Second (transfer) Laws of Thermodynamics. Heat to produce wind for turbines and for solar absorption is more than fossil fuel heat, because renewable energy resources are replaced, increasing warming.

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