More than 3,100 Pennsylvanians died prematurely in 2018 due to air pollution, the most in the nation, according to a new study published in the science journal Nature.
There was 791 murders during the same year in the state.
Instead, the administration appears to be complying with the wishes of the trucking industry, which has called for a new national nitrogen dioxide regulation to override states that could otherwise implement their own, tighter rules. On that front, the E.P.A. rule is likely to open a new battle in Mr. Trump’s long-running war with California over environmental regulations and states’ rights. California is already moving ahead with stringent state-level standards on nitrogen dioxide pollution from trucks that could be replicated by other states.