Pakistan is the world’s fourth most polluted country. Air pollution shortens the average Pakistani’s life expectancy by 3.8 years, relative to what it would be if the World Health Organization (WHO) guideline of 5 μg/m3 was met.1 Some areas of Pakistan fare much worse than average, with air pollution shortening lives by almost 7 years in the country’s most polluted regions, like Lahore and Peshawar.