Vehicle emissions refer to the gases and particles released into the atmosphere from the exhaust systems of cars, trucks, and other motor vehicles. These emissions primarily include carbon dioxide (CO2), nitrogen oxides (NOx), carbon monoxide (CO), and particulate matter. They are produced during the combustion of fuel, such as gasoline or diesel, and can contribute to air pollution and climate change. Reducing vehicle emissions is important for improving air quality and public health. Many countries have implemented regulations and standards to limit these emissions, encouraging the use of cleaner technologies, such as electric vehicles and hybrid models. Efforts to promote public transportation and carpooling also aim to decrease the number of vehicles on the road, further reducing emissions.