Earlier quoted context omitted.
A tax on carbon fuel would make more sense still. Polluters should pay for their pollution rather than foisting their externalities on others.
Except, how do you get to choose what type of power you buy? What if I live back east and would happily pay for wind or solar but my only option is coal or natural gas?
This is great but has the unfortunate side-effect of some energy suppliers telemarketing to try to get you to switch to their "lower rates", which inevitably increase again after a few months.
So check the system in your state, you may be pleasantly surprised.