In fact, in 1999, 16% of vehicles failed the Drive Clean test compared to just 5% in 2017. As a result, the number of passenger cars that failed the emissions test steadily began to decline. Technological advancements and standards within the auto industry have improved, leading to vehicles that are less hazardous to our environment. Since the program was introduced 20 years ago, Ontario’s air quality has greatly increased thanks to decreasing pollutants and emissions from vehicles. Improvements to Vehicles and the Environment It required vehicles over seven years old to undergo emissions testing every two years in order for drivers to renew their license plates. ![]() The Drive Clean test was put in place to help reduce vehicle emissions and air pollution, something that at the time, was becoming an increasingly concerning topic.
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