Depending on how it is produced. Electrolysis is fine but steam methane reformating is the cheapest method and emits CO2. (https://en.m.wikipedia.org/wiki/Hydro

Depending on how it is produced. Electrolysis is fine but steam methane reformating is the cheapest method and emits CO2. (https://en.m.wikipedia.org/wiki/Hydrogen_production https://en.m.wikipedia.org/wiki/Hydrogen_production)