> If someone burns enough electricity to power 1000 homes, but they pay for the environmental impact ...
Well, firstly, are we even sure that's really possible?
> Giving each household some amount of free or subsidized power makes sense
Which is basically exactly what I was talking about - we can and do decide that some uses are better than others, and use regulation (some of which may be tax or credit) to achieve that.
We already do this. I'm not sure why people are so aghast that we might do it some more for PoW cryptocurrencies.