What happened the terms we used to hear when it came to clean cars, like ZEV, AT PZEV, PZEV, SULEV, ULEV, and LEV?
These terms are the California Air Resources Board’s (ARB) emission standards that are still used in California’s motor vehicle regulations. However, a simpler way has been created for consumers to find the cleanest cars – the new Environmental Performance Label. These emission standards now correspond to a Smog Score found on the Environmental Performance Label.