Don't be so silly Bazz, if we do get the technology to tap geothermal, the greenies will start screaming that interfering with that heat Will make the planet explode, implode, or do some yet to be dreamed up awful consequence.

Geothermal is continuing exploration, there are good supplies of earth heat.;capped; Drilling is finding the most productive areas.
Co2 levels affecting fish, is interesting. There seems to be new species popping up all around the world.