Sulfur dioxide is a major air pollutant and has significant impacts upon human health. Motor vehicles are responsible for the main atmospheric pollutant emissions. Ozone at surface level is considered to be a harmful pollutant. The potential car trip displacement would result in a reduction of pollutant emissions. In addition, nitrogen dioxide is a common air pollutant found in the air. However, ozone present at the surface is a byproduct of smog and thus a pollutant. Ozone is on the list of six criteria air pollutant list. It benefits environmental protection by reducing pollutant residue. Ground level ozone is a prominent example of a secondary pollutant. The key pollutant for infant mortality rates is carbon monoxide. As such, caesium is not a major chemical environmental pollutant. TCDD is a carcinogenic persistent organic pollutant with long-term effects on the environment. Sulfur acts as a pollutant and an economic resource at the same time. Lead has long been considered to be a harmful environmental pollutant. Studies have shown that PFOS is a persistent, bioaccumulative, and toxic pollutant.