emission standard
Exhaust output cap
An emission standard is a regulation limiting pollutants released into the environment, typically from vehicles or industrial sources.
Governments set emission standards to control air quality: The factory failed to meet federal emission standards.
Automotive standards have grown stricter over decades, driving catalytic converter adoption and the shift toward electric vehicles.
- exhaustUse up entirely
- tailpipeVehicle's emission outlet
- pollutionEnvironmental harm from waste
- smogSunlight-activated urban pollution
- smog checkVehicle pollution compliance test
catalytic converter · EPA · regulation · diesel · rolling coal · carbon · carbon footprint · nitrogen oxide · particulate · clean air · air quality · compliance · vehicle · factory · smokestack · greenhouse gas · fuel efficiency · fuel economy