The Environmental Burden of the United States' Bitcoin Mining Boom

Bitcoin mines-massive computing clusters generating cryptocurrency tokens-consume vast amounts of electricity. The amount of fine particle (PM_2.5) air pollution created because of their electricity consumption, and its effect on environmental health, is unknown. In this study, we located the 34 largest mines in the United States in 2022, identified the electricity-generating plants that responded to them, and pinpointed communities most harmed by Bitcoin mine-attributable air pollution. From mid-2022 to mid-2023, the 34 mines consumed 32.3 terawatt-hours of electricity-33% more than Los Angeles-85% of which came from fossil fuels. We estimated that 1.9 million Americans were exposed to ≥0.1 μg/m³ of additional PM_2.5 pollution from Bitcoin mines, which were often hundreds of miles away from communities they affected. Americans living in four regions-including New York City and near Houston-were exposed to the highest Bitcoin mine-attributable PM_2.5 concentrations (≥0.5 μg/m³) with the greatest health risks.