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| energy efficiency ： ウィキペディア英語版 |
energy efficiency
Energy efficiency may refer to:
* Efficient energy use, the goal to reduce the amount of energy required to provide products and services
*
* Energy efficiency in transportation
* Energy conversion efficiency, the ratio between the output and input of an energy conversion machine
* Energy conservation, efforts made to reduce energy consumption
==See also==
* Negawatt power, a theoretical unit of power representing an amount of energy saved
* Fuel efficiency
* Energy storage
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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