EMISSIONS

the District of Columbia, California and its coalition — 17 other states and the District of Columbia — called the Environmental Protection Agency’s effort to weaken auto-emissions rules unlawful and accused the agency of failing to follow its own rules and of violating the Clean Air A ct.

“States representing 140 million Americans are getting together to sue Outlaw Pruitt — not Administrator Pruitt, but Outlaw Pruitt,” Gov. Jerry Brown of California said at a news conference, speaking of the EPA administrator, Scott Pruitt.

“This is about health, it’s about life and death,” he said. “I’m going to fight it with everything I can.”

California has separately threatened to sue if the EPA

challenges a waiver granted by the Obama administration that allows the state to set its own greenhousegas-emissions regulations.

The state has long been authorized under the 1970 Clean Air Act to write its own stricter air-pollution rules, and a dozen other states have traditionally followed those standards, which are designed to curb Earth-warming emissions from cars and light trucks.

In 2012, when the Obama administration set a comprehensive set of standards on greenhouse-gas emissions and fuel economy for cars and light trucks — aiming to roughly double the average fuel economy of new cars, SUVs and light trucks by 2025 — California agreed to harmonize its own regulations with the new federal standards.

But last spring, executives from the Big Three automakers went to the White House to ask for more-lenient emissions

rules, kicking off an effort by the administration to roll back those standards. The EPA, together with the National Highway Traffic Safety Administration, has now drafted a new set of regulations that would dramatically weaken the Obama-era rules after 2020.

California had said it would stick with the tougher regulations and had threatened to sue should Washington try to challenge its authority to follow its own air pollution rules. Tuesday’s lawsuit was seen as a pre-emptive move that calls the entire rollback unlawful.

The 18 jurisdictions joining in Tuesday’s lawsuit are California, Connecticut, Delaware, the District of Columbia, Illinois, Iowa, Maine, Maryland, Massachusetts, Minnesota, New Jersey, New York, Oregon, Pennsylvania, Rhode Island, Vermont, Virginia and Washington.