Delhi most polluted; Mumbai 4th in world: WHO report

Delhi has topped the list of polluted cities, while Mumbai is at number 4 in the world, says the World Health Organization (WHO) in its latest report. The new data from WHO shows that 9 out of 10 people breathe air containing high levels of pollutants.
2. The WHO estimates around 7 million people die every year from exposure to fine particles in polluted air that penetrate deep into the lungs and cardiovascular system, causing diseases including stroke, heart disease, lung cancer, chronic obstructive pulmonary diseases and respiratory infections, including pneumonia                        readmore..