Automobile emissions refer to the gases and particles released into the atmosphere from vehicles powered by internal combustion engines. These emissions primarily include carbon dioxide (CO2), nitrogen oxides (NOx), carbon monoxide (CO), and particulate matter. They contribute to air pollution and can have harmful effects on human health and the environment. To reduce automobile emissions, many countries have implemented regulations and standards, such as the Clean Air Act in the United States. Additionally, advancements in technology, like electric vehicles and hybrid cars, aim to minimize the environmental impact of transportation by producing fewer emissions compared to traditional gasoline or diesel vehicles.