To most of us, emission control systems are some sort of "black art" devices that have been forced upon us to rob performance and ruin gas mileage, but that's really not the whole story. Air pollution ...

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 ...

Driving has an impact on the environment, but the good news is that there are simple, effective ways to reduce that footprint, starting with the car you already drive. While fuel consumption and ...

The first iteration of zero-emission vehicle sales mandates in California goes into effect next year. But doubts have been raised about whether the targets can be met. Related Articles California sues ...