A multi-state lawsuit backed by New York challenging President Donald Trump’s administration’s effort to change ozone emissions standards has been upheld by the U.S. Court of Appeals, Attorney General Letitia James on Wednesday announced.

“New Yorkers have a right to clean, healthy air. But the fact is, over two-thirds of New Yorkers regularly breathe unhealthy air due to smog pollution,” she said. “We will continue our battle to compel the Trump Administration to follow the law in our effort to fight this public health hazard and to uphold New Yorkers’ legal right to clean, healthy air.”

The suit addressed the Clean Air Act’s “good neighbor” provision that bards upwind ozone pollution interfering with the ability of downwind states to meet an ozone standard of 75 parts per billion.

The court sided with the plaintiffs in the case, agreeing the change in the regulation that lowered the standard to be not enough.

The suit includes Connecticut, Delaware, Maryland, Massachusetts, New Jersey, and the city of New York.