Leah Stokes is an ignoramus.
“cars and trucks are the largest source of carbon pollution”
Nope, not even close. First, there’s no such thing as “carbon pollution”. Second, electricity generation emits more carbon dioxide than cars and trucks. If we only consider cars and trucks subject to CAFE standards, their emissions are far less than those associated with electricity generation.
At one time your were correct but in recent years, power plant CO2 has dropped a great deal because Nat gas and renewables have replaced much of the coal formally used to generate electricity