Top most highly polluted cities in the world
The world's most polluted cities are concentrated in South Asia, particularly in India, Pakistan, and Bangladesh, followed by China. These cities face extremely high levels of PM2.5 particulate pollution, often exceeding safe limits defined by the World Health Organization (WHO). Key Insights: India Dominates Pollution Rankings : Among the top 100 polluted cities globally, 39 are in India. Key cities like Delhi, Ghaziabad, Bulandshahr, and Noida frequently experience PM2.5 levels far beyond acceptable limits. Delhi, for instance, often records an Air Quality Index (AQI) above 500 during winters. Neighboring Countries : Pakistan and Bangladesh also face severe air pollution, with Lahore (Pakistan) frequently topping the global charts for the worst air quality. China’s Progress : While China is second in the number of polluted cities (30 out of 100), its efforts to mitigate pollution, including policies on renewable energy and urban planning, have led to a significant improvement in ...