非ひ化か石せき燃ねん料りょう

Meanings

1

non-fossil fuel

Refers to energy sources not derived from fossil fuels, such as renewables or nuclear. Often used in environmental and policy contexts.

fee, materials

化か石せき燃ねん料りょう
化石燃料 means 'fossil fuel'; 非化石燃料 is its direct opposite, meaning fuels that are not fossil-based.
再さい生せい可か能のうエネルギー
再生可能エネルギー specifically refers to renewable energy sources, which are a subset of non-fossil fuels.

Compound of 非 (hi, 'non-') + 化石燃料 (kaseki nenryō, 'fossil fuel').