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.
Context: Tim and Robert are both farmers who eat the majority of their diet from the foods they produce themselves. Tim has been spraying his crops for the last several years with high amounts of DDT as he enjoys how much it keeps the insects away. Robert instead avoids all DDT use and hires workers to hand check every single crop to remove insects and other pests.
Question: Who is at a lower risk for developing cancer from their crops?