Air pollution can also indirectly cause other health issues and even deaths. Air pollutants can cause an increase in cancer including lung cancer, eye problems, and other conditions. For example, using certain chemicals on farms, such as the insecticide DDT (dichlorodiphenyltrichloroethane) and toxic PCBs (polychlorinated biphenyl), can cause cancer. Indoors, pollutants such as radon or asbestos can also increase your cancer risk. Lastly, air pollution can lead to heart disease, including heart attack and stroke.
Mark moved from the country to a large city. Since moving to the city he noticed that he was exposed to a lot more smog and other air pollution. When he turned 60 he found out he had lung cancer even though he had never smoked.
Is Mark's cancer risk higher or lower in the city?