North Carolina has joined with 22 other state in a lawsuit about vehichle efficiency standards

Bravo to North Carolina, which has joined a lawsuit along with Nevada, Colorado, Wisconsin, New Mexico, and Montana, asking the EPA not to freeze fuel efficiency standards. Fuel efficiency standards reduce exhaust, and this in turn leads to lower ozone and particulate pollution levels. Fuel efficiency standards keep us all healthy and thriving.
You can also do your part to reduce air pollution by carpooling, walking or biking, using transit, and combining trips whenever possible.

https://www.greencarreports.com/news/1123951_23-states-now-oppose-epa-fuel-economy-freeze