What costs? Specifically the release of millions of years worth of CO2 into the atmosphere in just a couple centuries.
Nobody has proved beyond reasonable doubt -- and I emphasize the word reasonable -- that it has caused ANY harm, at all.
Nobody has been able to show, convincingly, that ANY weather pattern, or either singular or collective weather events, have been caused by "CO2-based warming". Lots of stuff has been BLAMED on it, but I'm talking about actual evidence.
So I repeat: show me the costs. We do not know - and I mean very literally do not know -- that there have been any. Any at all.
As far as scrubbers, are you saying acid rain wasn't a problem? Or Sulfur Dioxide? Or Nitrogen oxides? Mercury? Estimates are that coal plants kill thousands annually. So yes, pollute and you, and I did say we, should pay for it.
I didn't say anything like that. They DID pay to clean that shit up. Or rather, you and I did. None of those things are emitted at more than a tiny fraction of what they used to be.
Is it pristine? No, it's not. But it's ONE HELL OF A LOT BETTER than it used to be, and yes, we paid for that.
If you want 100% renewables right now, you're dreaming. And while I agree that we definitely should work toward that goal, I'm not willing to pay for your dream of having it this year. That's an unrealistic dream.
And I'm sure as hell not willing to pay to clean up some CO2 demon which science says is largely imaginary. Not the CO2. That's real enough. But any "harm" is so far only theory, and that theory is looking shakier every day.