https://interestingengineering.com/energy/steam-driven-nuclear-fusion-reactor
“In a global first, Richmond, Canada-headquartered fusion energy company General Fusion achieved the first-ever plasma in a reactor driven by steam.”
https://interestingengineering.com/energy/steam-driven-nuclear-fusion-reactor
“In a global first, Richmond, Canada-headquartered fusion energy company General Fusion achieved the first-ever plasma in a reactor driven by steam.”
Everything before that and almost everything after that.
The only exception i know is fermenting biomass to methane and burning it.