There’s no one right answer on green energy; geothermal’s great and it works well in Iceland because the entire country’s basically a big volcano: drill a hole and you’re likely to hit hot water. If you hooked steam turbines up to every hotspring in America you’d produce a lot of cheap, clean energy, but not nearly enough to run the entire country—plus you’d have the problem of “shipping” electricity around the country on our antiquated grid. It ultimately makes more sense to build a green energy system regionally: solar where it’s sunny, wind where it’s windy, wave power on the coasts, etc. Now if only we could figure out how to turn all this snow into electricity, we’d be set!
You don’thave to generate every kW by geo, but it is a more dependable source than the sun and wind, requires no toxic materials for generation and requires no storage.
Of all the “green” tech, only wave energy has this potential.
We still have coal.