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It also acts as the underlying assets supporting the pricing. How many millions of dollars are spent on mining equipment depreciation and electricity bills to mine one block of bitcoin?

That’s a good thing. Makes it that much more complex and expensive to simply duplicate

In the mid term, there are projects like ENVION (which has already launched) who solve that problem. Envion project is trying to use renewals energy for the mining industry. At the minute, Envion is the first major project trying to accomplish mining with renevals and to create a market in the powerplants industry using the blockchain tech.