Dive Brief: The U.S. Senate passed three joint resolutions May 22 nullifying California’s ability to set emissions standards for passenger cars, light duty vehicles and trucks that are stricter than national standards set by the U.S. Environmental Protection Agency. Auto and petroleum industry lobbyists targeted California’s Advanced Clean Car II regulations, adopted in 2022, which require all new passenger cars, trucks and SUVs sold in the state to be zero-emission vehicles by the 2035 model year. Federal law set in 1990 allows 17 additional states and the District of Columbia to follow California’s regulations. California Gov. Gavin Newsom, a Democrat, announced the state’s intention to file a lawsuit blocking the congressional resolutions, which await the signature of President Donald Trump to become law. Dive Insight: California’s ability to set its own vehicle emissions standards stem from the 1967 Air Quality Act, passed at a time when smog and poor air quality often permeated the Los Angeles basin. While air quality in California has improved over the years, experts fear a setback from the Senate’s action. “Public health could potentially suffer as a consequence,” said Michael Kleeman, a professor at the University of California, Davis, Department of Civil and Environmental Engineering. “This is, plain and simple, a vote against clean air to breathe,” said Aaron Kressig, transportation electrification manager at Western Resource Advocates, in an emailed statement. He warned of potential lost days at school or work and premature deaths. “Over 150 million people in the United States are already exposed to unhealthy levels of air pollution,” Steven Higashide, director of the Clean Transportation Program at the Union of Concerned Scientists, said in an emailed statement. “The standards are based on the best available science, and were finalized with extensive public input.” Along with public health concerns, the debate around California’s