World’s Most Polluted Cities
Air pollution has become one of the deadliest global health threats, with urban centres across South Asia recording some of the highest levels of toxic air. Recent data from Swiss air quality technology company, IQAir, and the World Health Organization (WHO) shows that India and its neighbors continue to dominate the list of the world’s most polluted cities.
New Delhi, home to more than 30 million people, regularly records air quality levels far beyond WHO safety guidelines. Other Indian cities, including Byrnihat, Greater Noida and Gurgaon, also feature prominently on global pollution rankings. The crisis extends beyond India’s borders, with Lahore in Pakistan and Dhaka in Bangladesh also registering hazardous levels of fine particulate matter (PM2.5).
Experts point to a combination of rapid industrialisation, rising vehicle emissions and geographic conditions that trap pollutants in the air. Weak environmental regulations and reliance on fossil fuels have further worsened the situation, creating a cross-border problem that affects millions across the region.
Health specialists warn that prolonged exposure to PM2.5 particles can trigger severe illnesses including respiratory infections, heart disease, stroke and lung cancer. Air pollution is now recognised as a leading cause of premature deaths worldwide.
The economic impact is also severe, straining healthcare systems and reducing worker productivity in already overburdened cities. Analysts caution that unchecked pollution could undermine long-term economic growth in South Asia.
Governments in India, Pakistan and Bangladesh have introduced measures such as cleaner fuel standards, public transport initiatives and industrial regulations. But progress remains slow, and environmental groups say current efforts fall short of what is needed.
Global health authorities are calling for stricter policies, investment in renewable energy and regional cooperation to tackle the crisis. Without decisive action, experts warn, air pollution will remain a silent killer for millions living in some of the world’s fastest-growing cities.
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