What Happened: The U.S. Environmental Protection Agency (EPA) recently proposed to delay Biden-era Tier 4 emissions standards for light- and medium-duty vehicles by two years, extending Tier 3 ...

EPA has proposed delaying compliance deadlines for certain light- and medium-duty vehicle emissions standards by two years, moving Tier 4 requirements to model year 2029.

The EPA has proposed delaying stricter emissions standards for light-duty and Class 3 medium-duty vehicles until model year 2029.

EPA proposes delaying Tier 4 standards for light and medium-duty vehicles until 2029 to match current market demands.

As early as this week, the Trump EPA is expected to propose delaying vital health protections against harmful air pollution from new cars, trucks and SUVs.