The Trump administration announced that fuel-efficiency regulations for cars and light trucks are too stringent and must be revised, beginning a process sought by the U.S. auto industry to roll back anti-pollution targets.

The EPA also said it was considering whether to revoke the waiver that allows California to set its own emissions rules that are tougher than the federal standards.

The national greenhouse gas emission targets that were a signature element of former President Barack Obama’s climate-change policy are too aggressive, U.S. Environmental Protection Agency chief Scott Pruitt said in a statement Monday outlining the decision.

“The Obama EPA’s determination was wrong,” Pruitt said in a news release. “Obama’s EPA cut the midterm evaluation process short with politically charged expediency, made assumptions about the standards that didn’t comport with reality and set the standards too high.”

The widely anticipated decision drew criticism from consumer and environmental groups. It dovetails with other steps to unwind actions aimed at combating climate change, such as President Donald Trump’s withdrawal from the Paris climate accord and the EPA’s repeal of a rule slashing carbon dioxide emissions from power plants.

The response from environmentalists was swift and harsh.

“The American public overwhelmingly supports strong vehicle standards because they cut the cost of driving, reduce air pollution, and combat climate change,” said Luke Tonachel, director of the Natural Resources Defense Council’s clean vehicles program. “Backing off now is irresponsible and unwarranted.”

Pruitt’s so-called final determination, announced but not released by the agency on Monday, is a step needed to dial back the Obama-era rules, which aimed to slash carbon emissions from cars and light trucks by boosting fuel economy to a fleet average of more than 50 miles per gallon by 2025. That standard is equivalent to roughly 36 mpg in real-world driving.

The EPA’s announcement echoed criticisms expressed by automakers, saying the Obama administration short-circuited the process and rushed out their final determination just days before leaving office. Pruitt said the agency would begin drafting fresh auto standards for 2022-2025 alongside the National Highway Traffic Safety Administration.

Gloria Bergquist, a spokeswoman for the Alliance of Automobile Manufacturers, said that vehicles need to remain affordable for consumers to replace older, less-efficient cars with newer ones.

“This was the right decision,” Bergquist said in a statement. The Auto Alliance represents a dozen automakers including General Motors Co., Ford Motor Co., Fiat Chrysler Automobiles NV and Volkswagen AG.