Ultra-low-emission vehicle
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An ultra-low-emission vehicle is a motor vehicle that emits extremely low levels of motor vehicle emissions compared to other vehicles. In some jurisdictions it is defined in law; low and ultra low em
Fuel cell vehicle
United States vehicle emission standards are set through a combination of legislative mandates enacted by Congress through Clean Air Act amendments from 1970 onwards, and executive regulations managed
Ultra-low-emission vehicle
…Low-emission vehicle United States emission standards California Air Resources Board…
Smog in the Los Angeles valley in 1972
All electric/battery cars, like those of Tesla, are considered zero-emissions vehicles (ZEV) under California's ZEV mandate.
Non-road engines include railway locomotives like this EMD GP38 modified to meet Tier 4 standards.
A representative dynamometer-based emissions test station