alternative energy
Noun
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Energy derived from sources that do not use up natural resources or harm the environment (synset 111444514)
is a type of: energy, free energy - (physics) a thermodynamic quantity equivalent to the capacity of a physical system to do work; the units of energy are joules or ergssubtypes:
- solar energy, solar power - energy from the sun that is converted into thermal or electrical energy
- wind generation, wind power - power derived from the wind (as by windmills)
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