Vehicular emissions and industrial activities were found to be associated with indoor as well as outdoor air pollution in Delhi.
In order to fight this life threatening effects of pollution, vigorous efforts should be made. Water Pollution — Wastes disposed of in rivers, oceans act as pollutant in water bodies.
These are burnt in cook stoves known as chullah or chulha piece in some parts of India. An overwhelming majority did.
Some studies tried to gather evidence for the effectiveness of control measures by comparing pre- and post-intervention health status. Please don't cut articles from FT.
However, some studies measured air pollutant levels and found a correlation with health-related events.