A coalition of environmental groups filed a lawsuit Friday seeking to block the Trump administration’s rollback of fuel efficiency standards, which they called a “giveaway” to the oil and auto industries.
Earlier this week, the US Department of Transportation finalized a rule weakening Corporate Average Fuel Economy (CAFE) standards, which require automakers to increase the fuel efficiency of their vehicles each year.
The Biden administration required annual fuel-efficiency improvements aimed at bringing the average for new vehicles to 50.4 miles per gallon by 2031. Under the Trump administration’s new rule, the 2031 requirement would fall below the 35.4 mpg already achieved by the 2024 fleet, according to the National Highway Traffic Safety Administration’s (NHTSA) own analysis.
NHTSA estimated that as a result of the rule change, Americans will consume roughly 122 billion more gallons of gas by 2050 than they would have under the old standards, increasing average lifetime fuel costs by more than $1,600 per vehicle—more than the roughly $1,300 the administration has claimed they’ll save on average in upfront vehicle costs.
It is also projected to add about 1 billion additional metric tons of CO2 emissions by 2050 compared with retaining the previous standards—equivalent to more than six months’ worth of emissions from the entire US transportation sector.
“Oil companies will profit from less efficient cars, but drivers will take a hit to their wallets and our kids will breathe dirtier air," said David Pettit, an attorney at the Center for Biological Diversity’s (CBD) Climate Law Institute. "We’ll all pay the price for more tailpipe pollutants spewing everywhere from playgrounds to wild places. We’re asking the courts to put a stop to this callous giveaway to Big Oil and Big Auto.”
CBD was joined by the Conservation Law Foundation, Environmental Defense Fund, Public Citizen, and Sierra Club, which filed a petition on Friday to ask an appeals court to review the rule change. They argue that the rollback is illegal because federal law requires NHTSA to set fuel-economy standards at the “maximum feasible” level manufacturers can achieve.
“The Trump administration’s rollback will mean wasted gas, more air pollution, and higher costs for Americans who are already struggling with high fuel prices,” said Andy Su, senior transportation attorney at Environmental Defense Fund. “We’re going to court to oppose this dangerous U-turn away from decades of successful work to make our cars more efficient and less expensive to drive.”
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