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alternating current
alternation
alternation of generations
alternative
alternative assessment
alternative comedy
alternative curriculum
alternative dispute resolution
alternative energy
alternative fibers
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Alternative Investment Market
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alternative energy

al·ter·na·tive en·er·gy


noun 
Definition:
 
naturally generated energy source: any form of energy obtained from the Sun, wind, waves, or another natural renewable source, in contrast to energy generated from fossil fuels

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