Our plants are already in compliance for particulate matter. It's the non-toxic, EPA dictated toxin CO2 the EPA is now willing to shut down an industry (more than one, to be honest) over.
Pretty ridiculous, if you ask me. But, I'm glad you brought up China.
When Nixon signed the Clean Air Act and the Clean Water Act, it was to reverse the damage done, to that point, by uncontrolled releases of real toxins.
Those objectives were achieved sometime in the late 70's or early 80's. Once flammable rivers were teeming with fish again. You could swim, once more, in the previously toxic lakes and eat what you caught. The air cleared up in all but the most congested cities.
Unfortunately, bureaucracies being what they are, the EPA had to create even more onerous standards for mobile and point source emissions, lest their job be done. So, we tightened car emissions standards to a point where most vehicles operate in a stoichiometric state, where toxic emissions are so low, they're difficult to measure with any accuracy.
That didn't stop the EPA. No sirree, Bob. What is the chief product of a stoichiometric internal combustion engine, burning gasoline? Carbon Dioxide. Well, what do you know, it's a ing greenhouse gas!
It's just gotten really silly.
You could go back to the 1985 standards and we'd never have a chance to ever approach the poor air quality found in China.
Stupid comparison, really.