Vehicle Emission Testing
Motor vehicles are a major source of air pollutants in metropolitan areas and emissions testing keeps an eye on the automobile and levels of pollution they put out. Studies by Colorado State University show that total vehicle emissions can be reduced to less than 50% of their previous levels by establishing an emissions testing program.
Emissions tests are basic safety and pollution checks that generally incorporate emissions tests for cars and trucks. These tests measure pollutant emissions produced by the vehicle while driving. Most tests focus on hydrocarbons and carbon monoxide, but some also test for oxides of nitrogen (NOx). States that requires emission testing tests for an acceptable level of these pollutants; when a vehicle’s emissions exceed this level, it fails the test.