India, according to the World Health Organization, tops the list of the world's most polluted countries. India's cities contain large amounts of air pollution, especially Delhi. This pollution accumulates in the air and water bodies through burning fossil fuels, vehicle emissions and particulate matter from industrial exhaust.
India's cities acquire pollution from several different toxins. Some chemicals appear more readily in its airspace than others, and present different threats. Scientists study the level of chemicals in time, recording which chemicals dissipate in time and which raise health and safety concerns. Particulate matter, nitrogen dioxide and sulfur dioxide primarily draw scientists' attention, and researchers monitor levels of carbon monoxide, too. The fluctuating levels of these substances help scientists determine the safety and quality of air throughout the country. The highest concentrations of pollutants occur in India's largest cities and metropolis areas while rural areas see less air pollution. Regardless of source, pollution appears inside and outdoors. It creates several negative effects, including impacting health and aesthetics. Pollution contributes to rising levels of certain diseases, such as lung cancer and emphysema. It also produces smog and haze, obscuring visibility and creating unpleasant smells. India, like other countries, reduces pollution using several methods, such as reducing the number of cars on the road and banning older vehicles.