WASHINGTON — The Trump administration is expected on Wednesday to formally revoke California’s legal authority to set tailpipe pollution rules that are stricter than federal rules, in a move designed by the White House to strike twin blows against both the liberal-leaning state that President Trump has long antagonized and the environmental legacy of President Barack Obama.
The Obama-era tailpipe pollution rules that the administration hopes to weaken would require automakers to build vehicles that achieve an average fuel economy of 54.5 miles per gallon by 2025, cutting about six billion tons of carbon dioxide pollution over the lifetimes of those vehicles. The proposed Trump rule would lower the requirement to about 37 miles per gallon, allowing for most of that pollution to be emitted.
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