Sustain Energy Fuels. 2022 Aug 24;6(19):4383-4387. doi: 10.1039/d2se00444e. eCollection 2022 Sep 27.
Green hydrogen could contribute to climate change mitigation, but its greenhouse gas footprint varies with electricity source and allocation choices. Using life-cycle assessment we conclude that if electricity comes from additional renewable capacity, green hydrogen outperforms fossil-based hydrogen. In the short run, alternative uses of renewable electricity likely achieve greater emission reductions.