A new international report has drawn attention to the deadly pollutants that pervade the air that people breathe in India, causing terrible illness and premature death. The State of Global Air 2017 study, conducted jointly by the Health Effects Institute and the Institute of Health Metrics and Evaluation, quantifies further what has been reported for some time now: that the concentration of the most significant inhalable pollutant, fine particulate matter with a diameter of 2.5 micrometres or less (PM2.5), has been growing in India. The rise in average annual population-weighted PM2.5 levels indicates that the Centre’s initiatives to help States reduce the burning of agricultural biomass and coal in Punjab, Uttar Pradesh, Rajasthan, Haryana and Delhi have failed. The directions of the National Green Tribunal to Delhi, which were reviewed last year, could not end open burning of garbage and straw, or curb the urban use of diesel-powered vehicles. It comes as no surprise, therefore, tha...