The Environmental Protection Agency finalized a regulation on Friday curbing emissions from heavy-duty vehicles, part of overall tailpipe rules the Biden administration is touting as its most aggressive effort yet to boost electric vehicles while combating emissions that contribute to global warming.
The finalized rule would enact stronger tailpipe emission standards for vehicles, such as freight trucks and buses, that are created between 2027 and 2032. However, the regulation differs from its initial proposal in that it would provide flexibility for manufacturers to meet the standards in the early years of the program, as vehicle technologies and charging infrastructure develop. The regulation has been paired with another tailpipe emissions standard regulating light-duty vehicles, such as passenger cars, that was finalized last week.
The transportation sector is the largest source of greenhouse gases, contributing 28% of the United States’s total emissions. Heavy-duty vehicles, specifically, account
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