Only, majority of mining farms, who mine the majority of btc, are using off-grid unused hydroelectric plants rented to miners leaving little to no carbon footprint. Even those that are on grid are using hydroelectric... 'reports and studies' can convert usage to coal and put up big co2 usage signs all they like, but fact is, they don't use much at all
Edit: actually, seems those ongrid will be moving offgrid soon too... which I doubt will be a problem, plenty of white elephant hydro staions there with owners begging for anyone to use them to get a little of their investments back
https://cryptovest.com/news/china-bitcoin-mining-losing-access-to-hydroelectric-power/