US environmental policies do not allow wafer fabrication. They can build a wafer fab, but the EPA will shut it down due to hazardous chemicals esp in proximity to residential neighborhoods. Silicon Valley polluted a lot of cities before being shut down. Can’t happen in the US unless you confiscate all of those land trusts and make them foundries. In case you want to see the type of environmental damage, take a look at the superfund sites in California.

https://www.epa.gov/superfund-redevelopment/superfund-sites-reuse-california