COLUMBUS, Ohio—The U.S. Environmental Protection Agency has rejected Ohio lawmakers’ attempt to allow Cleveland-area vehicle owners to avoid E-Check emissions testing simply by signing a form ...

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

For the first time in more than two decades, Coloradans will likely see an increase in the fee they pay to receive vehicle emissions tests. Right now, the state’s testing fee is $25 for vehicles made ...