Paul Gipe protests before the first of three public hearings on the Trump administration's proposal to roll back car-mileage standards in a region with some of the nation's worst air pollution Monday, Sept. 24, 2018 in Fresno, Calif. The day-long session by the U.S. Environmental Protection Agency and National Highway Traffic Safety Administration is a means to gather public comment concerning the mileage plan, which would freeze U.S. mileage standards at levels mandated by the Obama administration for 2020, instead of letting them rise to 36 miles per gallon by 2025. (AP Photo/Gary Kazanjian)

Paul Gipe protests before the first of three public hearings on the Trump administration's proposal to roll back car-mileage standards in a region with some of the nation's worst air pollution Monday, Sept. 24, 2018 in Fresno, Calif. The day-long session by the U.S. Environmental Protection Agency and National Highway Traffic Safety Administration is a means to gather public comment concerning the mileage plan, which would freeze U.S. mileage standards at levels mandated by the Obama administration for 2020, instead of letting them rise to 36 miles per gallon by 2025. (AP Photo/Gary Kazanjian)

FILE- In this April 23, 2018, file photo a car is filled with gasoline at a station in Windham, N.H. Conserving oil is no longer an economic imperative for the U.S., the Trump administration declares in a major new policy statement that threatens to undermine decades of government campaigns for gas-thrifty cars and other conservation programs. (AP Photo/Charles Krupa, File)

FILE- In this April 23, 2018, file photo a car is filled with gasoline at a station in Windham, N.H. Conserving oil is no longer an economic imperative for the U.S., the Trump administration declares in a major new policy statement that threatens to undermine decades of government campaigns for gas-thrifty cars and other conservation programs. (AP Photo/Charles Krupa, File)

South Korean Minister of Land Infrastructure and Transport, Kim Hyun-mee, center, speaks at a press conference at the government complex in Seoul, South Korea, Tuesday, Aug. 14, 2018. South Korea will ban driving recalled BMWs that haven't received safety checks following dozens of fires the German automaker has blamed on a faulty exhaust gas component. (Kim Seung-doo/Yonhap via AP)

A woman cools down under a fountain in Saint Jean de Luz, southwestern France, Monday, Aug.6, 2018, where temperatures rose up to 35 degrees Celsius ( 95 degrees Fahrenheit). The heat wave in France is expected to last until Thursday, with temperatures peaking Tuesday. (AP Photo/Bob Edme)

FILE- In this Jan. 11, 2018, file photo, cars pass the Queensboro Bridge in New York. The Trump administration is citing safety to justify freezing gas mileage requirements. A draft of a regulation prepared this summer would freeze an Obama-era program to improve fuel efficiency and cut pollution. (AP Photo/Frank Franklin II, File)