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After years of anticipation, Ethereum has implemented a major network upgrade that completely changes the way the blockchain verifies transactions, mints new coins, and secures its network. This system reduced Ethereum’s energy consumption by more than 99%. The massive energy use of the cryptocurrency industry has always been criticized. However, Bitcoin is unlikely to follow Ethereum. Instead, the Bitcoin network adheres to a system called proof-of-work, where special computers try to guess a winning number used to verify transactions and create new coins. This is what is known as mining.