Turnipseed

6 Ways to Play Clean Energy

I'm no expert on geothermal, but there are 2 problems not mentioned. First, you need a steep geothermal gradient - ie, rock temperature increases rapidly with depth. That's why Iceland has abundant geothermal power. There are very few places in the world with steep geothermal gradients and also near inhabitated areas. The projects in NV, UT and elsewhere don't have as steep a gradient as found in Iceland. Next, dissolved minerals in hot water can be a major problem. Rapid cooling of superheated water will cause precipitationof minerals, plugging up pipes etc.