Delhi is the world’s most polluted city as per the new data compiled by WHO

The data was compiled for megacities with the population more than 14 million. Second most polluted: Greater Cairo in Egypt Bangladesh's capital Dhaka takes the third position. India's commercial capital Mumbai is the fourth most polluted city in the world. Beijing follows as the fifth. An analysis of particulate matter in the air showed about 90% of people across the world are exposed to bad air. 7 million deaths in 2016 are linked to pollution, according to WHO. Of them, ambient air pollution — caused by industries, cars and trucks, among others – killed 4.2 million people. While indoor pollution caused 3.8 million deaths, in 2016. In India, mitigation measures have tended to focus on Delhi although other, smaller cities too confront toxic levels of pollution. The government and judiciary have proactively led the battle against pollution. India is to switch to Bharat Stage VI vehicle emission norms in April 2020, skipping an intermediate stage.