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Niel: Germany pays 2.5x (taxes) for electricity which makes converting to solar more economicaly viable paid for by said taxes. Iceland has a lot of geothermal available which makes it a lot easier for them. I don't know the specifics on the other countries.
A local project at the campususing geothermal for heating because we actually have a fair ammount available in my area. The problem is that after all of the technical issues that popped up, they had to dig deeper than expected, and the water still turning out colder than expected, the water was more brackish than expected etc.... the system will likely never pay for itself as far as economic cost, even if it lasts as long as claimed.
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