Maybe you've been hearing more about geothermal energy lately -- it gets mentioned more in the mix with solar and wind these days, especially when politicians are listing off, quickly as possible, all the forms of renewable energies they can think of. In case you don't know much about it, HuffPost Green has compiled this little FAQ.
What is geothermal energy?
Geothermal energy is a cheap and largely untapped natural energy resource. It's an intriguing sustainable energy source due to its unlimited...
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