22 out of 30 cities that have the world’s worst air pollution are in India, says report

India has dominated the rankings of a new report on air pollution, with 22 out of the top 30 most polluted cities in the world located in the South Asian nation.The readings from 3,000 cities, analysed by Greenpeace and AirVisual, were measured against the World Health Organisation’s annual exposure guideline for PM2.5 fine particulate matter – tiny airborne particles, measuring about a 40th of the width of a strand of human hair, that are linked to a wide range of health problems.All the…