The rest of the world is also pretty much on board with this clean air and climate change stuff as it turns out people generally like clean air, so if this sticks at some point the only logical next step would be to compel US to stop polluting the world.
If I understand correctly, this also removes EPA ability to regulate car emissions, arguing that it will allow for cheaper cars. Why would US public really wants newly made clunkers on their cities? Polluting cars are horrible city life quality downgrade that even the rich can't escape.
Also, will this allow to put the banned due to the dieselgate VW vehicles back on the roads?