Bitcoin mining is super important. It keeps our favorite cryptocurrency going. Mining is the process of verifying the bitcoin transactions and adding them to the public ledger, and being rewarded for doing the same. It involves solving complex cryptographic puzzles which are highly computation intensive. Anyone can become a miner, provided that you have access to the Internet and the hardware required to do the difficult calculations
https://blog.unocoin.com/how-much-electrical-power-does-the-bitcoin-network-use-e43ff150d6b7
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From @ermoonvictor