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

The U.S. government is in full retreat from its efforts to make vehicles more fuel-efficient, which it had been prioritizing, along with state governments, since the 1970s. As a scholar of how vehicle ...

Cataclean is encouraging workshops to take practical steps to help reduce vehicle emissions ahead of Clean Air Day on 18th ...

Millions of Pennsylvania drivers could catch a break on their annual vehicle inspections if a bill winding its way through ...

Some lawmakers argue the requirement is unfair as most of southeast Wisconsin's ozone comes from out-of-state pollutants.