If India reduced its air pollution to comply with the World Health Organisation’s (WHO) air quality standards, points out an IndiaSpend report, its people could live about four years longer on average, the Air Quality-Life Index (AQLI) released on 12 September by the Energy Policy Institute at the University of Chicago shows.

Among India’s most populous cities, the National Capital Territory (NCT) of Delhi would make the most impressive gains in average life expectancy (nine years), followed by Agra (8.1 years) and Bareilly (7.8 years)….