Everytime there is cheap labor or poor country, they end like this. Not because of crypto per ce (especially since there are more and more Proof of Stake coins), but because of corporations' greed ¯\_(ツ)_/¯ Why bother with nature when you're making profits?
So yeah, crypto doesn't pollute - people do
I was about to say it was the people that polluted Jakarta. I wonder if there is a huge mining farm in Jakarta Indonesia since as far as I can see on the internet, the electrical cost in that place can render the mining industry in negative ROI unless the mining farm is using its own renewable energy, the mining farm is bound to bankruptcy.