Exhaust system Law in the United States and other countries to not have a catalytic converter. Converters may not be removed from a vehicle that is used only for "off-road" driving in the United States. The main purpose of a catalytic converter on an automobile is to reduce harmful emissions of hydrocarbons, carbon monoxide and nitrogen oxides into the atmosphere. They work by transforming the polluted exhaust components into water and carbon dioxide. Cat-back (also cat back and catback) refers to the portion of the exhaust system from the outlet of the catalytic converter to the final vent to open air. This
Pollution Probe achieved the passage of mandatory vehicle emission testing in Ontario. In 2004, Pollution Probe helped to obtain further regulations in Ontario to reduce metal smelter facility emissions that can cause acid rain. In 2010, the organization helped to persuade the legislature to enact regulations to limit car and truck greenhouse gas emissions. In 2013, the organization collaborated with five power utilities to launch the Electric Mobility Adoption and Prediction ("EMAP") project. In 2016, Pollution Probe and Plug’n Drive issued a report with recommendations intended to increase sales and use of electric vehicles. In 2017, Pollution Probe was appointed one of