According to the World's Health Organization, India is at the top of the list of the earth's most polluted countries. India's cities carry large amounts of air pollution, especially in Delhi. The highest concentration of pollutants occurs in India's largest cities and metropolitan areas while rural areas see less air pollution.
Pollution creates adverse effects, including impacting health and aesthetics. Pollution can contribute to certain diseases, such as lung cancer and emphysema. Pakistan is very polluted. New Delhi is the most polluted city, and it generates sixty times higher air pollution than is safe.