This Sunday, the US EPA is expected to announce its scrapping of ambitious mileage targets for upcoming cars.
The current requirement is that new cars and SUVs get an average of 55-miles-a-gallon by 2025. That standard was set by the Obama Administration, working alongside California regulators.
The Trump Administration says the standards are unrealistic and will keep Americans from being able to buy the pickup trucks and SUVs they prefer.
But California leaders say they won’t relax their requirements for car makers. That sets up a possible showdown between the state and federal governments.
Sean Hecht, professor of environmental law and co-executive director of the Emmett Institute on Climate Change and the Environment at UCLA