Why do townspeople more often than rural residents suffer from respiratory diseases?

This is due to the fact that there are quite a large number of cars in cities. They emit a lot of harmful substances into the air. People breathe this air almost constantly. It is only at night that the composition of the air improves, as cars at night are rare. But the situation in the villages is not always good either. The composition of the air is especially deteriorated in autumn, as people burn the leaves. This is very dangerous to health. Also, decay products can affect the respiratory system. In almost every rural house there are animals that release waste.