Emission testing was designed to cut smog emissions from cars, trucks and buses.

Driving clean means keeping your vehicle well tuned and maintained. Vehicles that receive regular tune-ups and are in good working condition use less fuel, and emit fewer pollutants into our air.

Ontario's Drive Clean Program is cutting smog-causing pollutants from vehicle sources in the program area.

Ontario's Drive Clean program is concerned with helping us make smart choices about the way we maintain and drive our vehicles. Driving clean can save you up to 10 percent in annual fuel consumption and prolong the life of your vehicle. But more importantly, you will be doing the right thing for the air that we breathe.

In Ontario, cars, trucks and buses are major sources of smog pollution, especially in densely populated urban areas. These smog causing pollutants include nitrogen oxides, volatile organic compounds and fine particulate matter. Improvements in the design of vehicle exhaust systems have reduced pollution from individual vehicles. However, total emissions are expected to increase because of the growing numbers of vehicles on the road. Poorly maintained vehicles also contribute to pollution.