alternative energy
US /ɔːlˌtɜːr.nə.tɪv ˈen.ɚ.dʒi/
UK /ɔːlˌtɜːr.nə.tɪv ˈen.ɚ.dʒi/

1.
代替エネルギー
energy, such as solar, wind, or hydroelectric energy, that does not come from fossil fuels and is therefore less harmful to the environment
:
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The government is investing heavily in alternative energy sources.
政府は代替エネルギー源に多額の投資を行っている。
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Many countries are shifting towards alternative energy to combat climate change.
多くの国が気候変動対策として代替エネルギーに移行している。