Emissions in a vehicle refer to the gases and particles released into the air as a byproduct of the combustion process in the engine. The combustion of fuel in an internal combustion engine produces various pollutants, including carbon dioxide (CO2), nitrogen oxides (NOx), particulate matter (PM), and hydrocarbons. These emissions contribute to air pollution and have environmental implications, including the greenhouse effect and the formation of smog. In response to environmental concerns, modern vehicles are equipped with emission control systems, such as catalytic converters and oxygen sensors, which help minimize the release of harmful pollutants. Regular emission testing and maintenance are crucial to ensure vehicles comply with environmental standards, reduce air pollution, and promote cleaner and more sustainable transportation. We are a Wisconsin Certified Emission Testing Center.