https://spectrum.ieee.org/environmental-impact-of-bitcoin-mining
"
The study was conducted between August 2022 and July 2023. The researchers found that 32.3 terawatt-hours of electricity were consumed by the 34 Bitcoin mines—for comparison, 33 percent more electricity usage than the entire city of Los Angeles. 84 percent of that power was generated by plants burning fossil fuels. In other words, Bitcoin mining has essentially added a large city's worth of electricity consumption—and the accompanying pollution."