Across the United States, the rules for checking tailpipe pollution are quietly shifting, even as climate targets grow more ...

Depending on where you live in the United States, emissions testing of old cars may or may not even be a thing. There are 28 states where at least some (though not necessarily all) are required to ...

After years of debate, Gary residents may soon see an end to the every-other-year vehicle emissions testing that’s long been required in Lake and Porter counties, thanks to a push state lawmakers are ...

Automaker Mercedes-Benz has landed in some hot water regarding emission tests. Mercedes-Benz USA and parent company Daimler ...

Air quality scientists slammed Republican Del. Christopher Bouchat and state Sen. Justin Ready’s plans to cross-file legislation that would eliminate the Maryland Vehicle Emissions Inspection Program ...

The Volkswagen Dieselgate scandal, one of the most infamous controversies in automotive history, exposed systemic emissions ...