You just entirely destroyed the EPA.
https://www.fas.org/sgp/crs/misc/R42635.pdf
Additionally, states generally can't impair existing contracts through legislation due to the contracts clause.
See https://en.wikipedia.org/wiki/Contract_Clause (mainly because i'm too lazy to write it all up here).
> would allow foreign corporations to sue the United States government for actions that undermine their investment “expectations” and hurt their business
http://www.nytimes.com/2015/03/26/business/trans-pacific-par...
While in some sense that corresponds to the words I used (by which I mean, I see why you mention it as relevant), it definitely doesn't come close to applying here, as that is international law.
Yeah, but there's probably bad consequences to it also.