https://motherboard.vice.com/en_us/article/neganb/bitcoin-mining-could-raise-global-temperatures-by-2-c

If Bitcoin is adopted at rates similar to other technologies, like credit cards, it could increase global temperatures by two degrees Celsius by 2033 according to a study published on Monday in Nature Climate Change.

To put this in perspective, a recent climate change report from the United Nations found that a temperature increase of over 1.5 degrees Celsius would lead to irreversible, catastrophic climate effects.