Every structure in the USA would have to be inspected and then knocked down and built anew, or “retrofitted” so that it was totally powered by solar or wind or tidal action or some other form of totally non-polluting power.
This would cost so much money that from the moment it was enacted, the USA would be bankrupt. The cost of this project would in a decade triple the national debt. This would make it completely unpayable EVER.
Inflation would explode as federal money chased a limited pool of workers and resources. The country would be in a crisis that would make the Great Depression look like a picnic.
And meanwhile that immense cloud of air pollution raging out of China would not be reduced at all. In other words, we would have committed national economic suicide for nothing.