Zero-emissions vehicle

A so-called zero-emission vehicle, or ZEV, is a vehicle that does not emit exhaust gas or other pollutants from the onboard source of power but still emits pollutants during its construction phase, production of energy carrier etc. Therefore, the term "zero-emission" has been described as abusive or greenwashing.

The California definition also adds that this includes under any and all possible operational modes and conditions. This is because under cold-start conditions for example, internal combustion engines tend to produce the maximum amount of pollutants. In a number of countries and states, transport is cited as the main source of greenhouse gases (GHG) and other pollutants. The desire to reduce this is thus politically strong.