What is ""ऊर्जा-फलोत्पदक"" in American English and how to say it?

Hindi

ऊर्जा-फलोत्पदक

ऊर्जा-फलोत्पदक-energy-efficient.svg
American English

energy-efficient

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Example sentences

American EnglishThe penguins' short feet are an adaptation.

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