Two key air pollutants can affect asthma. One is ozone (found in smog). The other is particle pollution (found in haze, smoke, and dust). When ozone and particle pollution are in the air, adults and children with asthma are more likely to have symptoms. Below are research inserts that will provide further insight to air pollutants and the impact on human health.
According to Leikaul “exposure to current levels of air pollution has been associated with an increase in respiratory symptoms and hospital admissions for asthma.”
Leikauf G. D. (2002). Hazardous air pollutants and asthma. Environmental health perspectives, 110 Suppl 4(Suppl 4), 505–526. doi:10.1289/ehp.02110s4505