The study looked at pollution in urban areas and how to control it effectively. The researchers used computer simulations and actual samples to study pollution in a small city area. They found that homes, businesses, and factories are major sources of pollution. Rainfall patterns mainly affect how pollution levels change over time. Early droughts don't lead to more pollution. Adding more plants in cities is better than just cleaning roads to reduce pollution. Cleaning roads more often is more helpful than cleaning them better. The study gives advice on controlling pollution and monitoring it in cities.