Despite the proven health, financial, and economic benefits of the existing Clean Car Standards, the Trump Administration is attempting to reverse this progress. The National Highway Traffic Safety Administration recently issued a regulation designed to preempt other states’ Clean Car Standards. NHSTA is overstepping its authority and encroaching on the rights of states to protect their own citizens and environment. This regulation would effectively revoke the rights of Pennsylvania to control vehicle pollution within our own borders, both now and in the future.