Ozone is a naturally occurring gas that is not typically considered a major air pollutant. However, it can be formed in the atmosphere through chemical reactions involving other pollutants, such as nitrogen oxides and volatile organic compounds.

Vehicle exhaust is a major source of particulate matter, especially in urban areas. Diesel engines emit particularly high levels of PM, which can contribute to respiratory problems and other health issues.

Nitrogen dioxide (NO2) has been linked to an increased risk of heart disease, as it can contribute to the formation of blood clots and inflammation in the arteries.

Carbon monoxide (CO) binds to hemoglobin in the blood, reducing the amount of oxygen that can be carried to the brain and other organs. This can lead to neurological damage, including headaches, dizziness, and impaired cognitive function.

Ozone (O3) is a strong oxidant that can irritate the airways and cause inflammation. Exposure to ozone has been linked to an increased risk of asthma and other respiratory problems, especially in children.

Advection is the process by which air pollutants are transported over long distances by the wind. This can occur when air masses move from one region to another, carrying pollutants with them.

Smog is a type of air pollution that is formed when sunlight reacts with nitrogen oxides and volatile organic compounds in the presence of high temperatures and low wind speeds. High humidity can also contribute to the formation of smog.

Deposition is the process by which air pollutants are removed from the atmosphere and deposited on the ground or water. This can occur through dry deposition, in which pollutants are directly deposited onto surfaces, or wet deposition, in which pollutants are removed from the atmosphere by rain or snow.

Benzene is a known carcinogen that has been linked to an increased risk of leukemia and other types of cancer. It is found in gasoline and other petroleum products, and can be released into the air from vehicle exhaust and industrial emissions.

Phytotoxicity is the term used to describe the process by which air pollutants can cause damage to plants and ecosystems. This can occur through a variety of mechanisms, including direct damage to plant tissues, interference with photosynthesis, and changes in soil chemistry.

Particulate matter (PM) has been linked to an increased risk of stroke, as it can contribute to the formation of blood clots and inflammation in the arteries.

Photochemical reactions are chemical reactions that are initiated by sunlight. These reactions can transform air pollutants into different chemical forms, which can have different health effects.

Particulate matter (PM) has been linked to an increased risk of chronic obstructive pulmonary disease (COPD), as it can cause inflammation and damage to the airways.

Advection is the process by which air pollutants are transported from one region to another by the wind. This can occur when air masses move from one region to another, carrying pollutants with them.

Radon is a radioactive gas that is found in the soil and can seep into homes and other buildings. Exposure to radon has been linked to an increased risk of lung cancer.