We do produce clean coal. New coal plants are clean except for, gasp, producing CO2.
Well Clean is relative... Even the cleanest burning coal, with the best pollution controls, still produces a lot more than JUST C02.
Yes its a LOT cleaner than it was not all that long ago, but lets not overstate it.
You can’t burn ANYTHING without producing C02. That’s what combustion is... And that’s why its being latched onto by those who want control... because you can’t clean away C02.. its effectively what combustion is.