Bitcoin is not predominantly mined by a ton of individuals running an ASIC or 2. It is mined in huge warehouses, which have to go through state/federal bureaucracy for business licenses, etc etc. It would be hard to enforce a complete ban on anyone mining any Bitcoin, but the vast, vast majority of mining could be easily shut down in the US, as it was in China.

If electricity was an unlimited non-polluting resource, sure. But when my neighborhood mining rig coal power plant gives me cancer, it's not just a simple marketplace thing.