That is the lefts way of saying "only immigrants from Norway"
It would devastate the poor worldwide. Nations that are rich are the only ones that can spend to care about the environment.
If you want clean air in India and China you want a middle class that demands it because they're not starving.
Selling things in the USA profitably on the basis of cheap labor in countries with weak environmental and labor protection should not be so simple.
A tariff program is probably not even necessary because overwhelmingly American corporations can simply be taxed for their import activities in a VAT manner and the problem goes away.