President Barack Obama’s administration is rolling out new emission standards for heavy-duty vehicles like trucks and buses that White House officials say will cut U.S. carbon pollution by approximately 1.1 billion metric tons and reduce the nation’s oil consumption by up to 84 billion gallons by 2027.The new rules mandate 25 percent lower carbon emissions and fuel consumption for semitractor-trailer rigs, delivery trucks, school buses and similar vehicles between model years 2021 and 2027. The regulations are intended to build on prior rules that required companies to reduce the pollution by trucks and buses that were made in the model years between 2014 and 2018 by approximately 270 million metric tons.
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