You do, do you? I suppose it is of the variety where miners magically only use clean energy?

Kill the value of POW as a store of money and see how much of that computing still happens. Then you’ll know how useful it is.

nah. the bad news is that a lot of energy is generated with coal. so you get the arsenic and other crap with our without bitcoin.

now, the question is: who decides what’s acceptable and what’s not acceptable for energy use?

The government defines efficiency standards. I’d bet money some are coming for crypto soon.