I've been to Rotorua, NZ. They dump soap into a geyser to set it off for the tourists. (Of course, they said it was first found by convict labor washing clothes in a hot spring, the soap breaking the surface tension holding the water back, "...tossing the clothes into the trees for automatic wash and dry.")
The envirowackos don't even like humans being in, other than them, naturally, National Parks.
So any use other than just existing, is a non-starter.
Geothermal energy is endlessly replenish-able.
Much of the electricity in the US is produced by coal burning steam turbines...
All that heat..no pollution and no product....
It’s the enviroweenies that are actually the pi$$poor stewards of the earth.