Bitcoin mining industry size is small in energy consumption to other industries. It won't be a big or biggest problem of green house gases, air pollution or climate change.

Debunking the "Bitcoin is an environmental disaster" argument
https://bitcoincleanup.com/
https://endthefud.org/energy
https://ccaf.io/cbnsi/cbeci/ghg/comparisons
Gold mining creates more MtCO2e per year than Bitcoin mining.