Geothermal power plants are much like fossil and nuclear plants with exception of no requirements of:

A geothermal power plant resembles fossil and nuclear plants but does not need a boiler or a fission reactor.

It draws natural steam and heat from the earth, so it needs no boiler to raise steam.

It relies on the planet's internal heat, so it needs no fission reactor to generate heat.

Vapour-dominated hydrothermal resources are in fact essential, as they supply the steam that drives the plant.

A turbine generator is also still required to convert that steam into electricity.

This gives geothermal power a low fuel cost and steady output.