“Roman Baths”  (Trier) used Geothermal Energy 2 Millenia ago!

 

 

Geothermal Energy:

99% of the Earth is 1000° C. or more, 99,99% is > 100° C.

About 70% stems from radioactive decay:  we will have sufficient heat to meet all our needs for another few BILLION years! 

So: I’d call it Renewable Energy :-)

 

———————————————       Prince Piero Ginori Conti invented the first geothermal power plant in 1904, at the Larderello dry steam field in Italy.

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“Snow Monkeys”  (Japan) use Geothermal Energy.

"If at first an idea isn't absurd, there is no hope for it." - Albert Einstein