再さい生せい可か能のうエネルギー

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Meanings

renewable energy

Refers to energy from naturally replenishing sources such as solar, wind, hydro, geothermal, and biomass.

自し然ぜんエネルギー
Often used interchangeably, but 自然エネルギー emphasizes energy from natural forces (sun, wind, water) while 再生可能エネルギー is the broader technical term including biomass and geothermal.
クリーンエネルギー
Focuses on low environmental impact; not all renewable energy is necessarily 'clean' in every context, but the terms overlap heavily in public discourse.

火か力りょく発はつ電でんN1
火力発電 depends on finite fossil fuels, while 再生可能エネルギー refers to renewable sources like solar or wind.

Compound of 再生可能 (renewable) + エネルギー (energy), a calque from English 'renewable energy'.