Green hydrogen is made using electricity from renewable energy to electrolyze water, separating the hydrogen and oxygen atoms. It’s a clean alternative to fossil fuels that, unlike traditional renewables like solar and wind energy, can be stored and used at any time of day, in any weather condition. It also may be the only way to bring greenhouse gas emissions from the power sector to the equivalent of zero, considering several countries’ commitments to carbon neutrality over the next 20-40 years.