PoW runs just fine on 100% renewable energy. That PoW pollutes at all is because society allows it. Nothing stops the EPA (and similar bodies across the world

PoW runs just fine on 100% renewable energy. That PoW pollutes at all is because society allows it. Nothing stops the EPA (and similar bodies across the world) from requiring exchanges in their jurisdiction to do taint analysis on newly-mined coins in order to determine whether or not they came from a "certified-green" miner, and if not, apply an extra carbon tax on them (or deny their sale outright).