How are water and biomass fundamentally different from solar and wind energy?

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How are water and biomass fundamentally different from solar and wind energy?



- Water and biomass are potentially depletable, but solar and wind energy will always be there as long as the sun shines and the wind blows. Water power and biomass energy are not always automatically renewed by nature. They may be depleted if the environment necessary for their renewal is not maintained.


- For biomass to be renewable for biofuels, both water and soil are necessary for plant growth. If either of these is depleted, then biomass production may decrease or even stop.


- Water behind a dam depends on the climate to produce runoff. If the climate becomes arid, runoff may be reduced and the dam will store less water and produce less electricity. If people divert river water for crops upstream of a dam, there will be less water in the reservoir and hydropower will be reduced.

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