Emissions testing laws are a crucial component in the fight against air pollution and climate change, yet these regulations vary significantly across the United States. Understanding these differences ...

The California Air Resources Board (CARB) has certified only one telematics provider to participate in its Clean Truck Check (CTC) program with just over a quarter of the year left before heavy- and ...

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 ...

If you're due to get your vehicle tested for pollutant emissions, the process is now a bit easier in the Milwaukee area: the state's Department of Transportation just installed two self-service kiosks ...

As the saying goes, two wrongs don't make a right. But can two rights cancel out a wrong? It can when the right things are hydrogen and carbon--two resources packed with energy--and the wrong thing is ...