Gas turbine runs on 100% pure hydrogen. The skeptics are constantly complaining about how the wind and solar renewables “will never” be able to give the grid dispatchable power. Well, as long as gas turbines can run on hydrogen, they can still be used as generation as long as they burn green hydrogen. However there are now hydrogen fuel cells that are as efficient as gas turbines and can generate with no moving parts.
Gas turbine makers are running some of theirs on a small percentage of hydrogen, but all fossil fuels must be discontinued to stop releasing CO2 into the atmosphere.