Ashok MishraDelhi has once again earned the dubious distinction of being the most polluted city in the world. This is no longer merely a local issue for the capital; it has become a symbol of an environmental, health, and economic challenge facing all of India. On November 13, 2026, Delhi surpassed Lahore, Pakistan, to become the world’s most polluted major city. Delhi’s Air Quality Index (AQI) reached 334—a level classified as 'hazardous.' India’s official Central Pollution Control Board (CPCB) assessed the situation as even more critical, recording an AQI of 403 and placing it in the 'severe' category.
The following day, Saturday, saw no significant improvement, with the capital’s AQI recorded at 348 in the morning. A thick haze blanketed the city—home to nearly 20 million people—reducing visibility and making even breathing a struggle. This raises a fundamental question: can India’s development journey and clean air coexist? The current situation in Delhi did not emerge overnight; it is the most visible manifestation of a pollution crisis that permeates nearly every major city in India. A combination of factors—including industrial activity, vehicular emissions, construction work, and the burning of crop stubble—drives air pollution across the country, with severe consequences for public health and the environment.
According to a significant study published in *The Lancet Planetary Health* in December 2024, the sources of PM 2.5 pollution in India are attributed as follows: approximately 27% from ammonia-related pollution linked to agriculture, 23% from vehicles and other modes of transport, 20% from the burning of waste and biomass (such as wood), and about 17% from dust. This means that attributing the blame for pollution to a single source is neither scientifically accurate nor useful for finding a solution, as farms, roads, factories, construction sites, and household cooking fires all contribute to making the air toxic. Another study reveals that 80 percent of the pollution in the country is caused by dust and smoke; notably, vehicle emissions are a less significant factor than the burning of biomass. The country is paying a heavy price for this toxic air—both in terms of human lives and the economy.
According to the 'State of Global Air' 2025 report, approximately 8 million people worldwide died due to air pollution in 2023, with about 2.06 million of these deaths recorded in India. Prolonged exposure to polluted air increases the risk of conditions such as asthma, bronchitis, COPD, lung cancer, and heart attacks. The World Health Organization (WHO) notes that air pollution is linked to an increased risk of developing new cases of asthma and can exacerbate symptoms in those already suffering from the condition. Children, the elderly, pregnant women, outdoor workers, traffic police, street vendors, and daily-wage laborers are the most vulnerable to this pollution, as they lack the option to stay indoors or the financial means to purchase expensive air purifiers. The economic toll is also substantial; India incurs an annual economic loss of approximately 19 to 20 lakh crore rupees due to air pollution—a cumulative result of lost workdays, medical expenses, reduced productivity, and negative impacts on tourism and investment. At the root of the problem also lies India’s development structure. Rapid urbanization, reliance on private vehicles, coal-based energy, polluting industries—such as brick kilns, cement, and steel plants—open waste burning, road dust, and the use of wood, coal, and cow-dung cakes as domestic fuel collectively create a system where pollution from one city spreads to another. The case of Delhi serves as proof that pollution does not respect state boundaries; winds carrying industrial emissions and smoke from agricultural residue from Haryana, Uttar Pradesh, Rajasthan, and Punjab further burden the air in the national capital.
Emergency measures—such as the 'odd-even' vehicle scheme, construction bans, or school closures—cannot provide a permanent solution for Delhi alone. While initiatives like the National Clean Air Programme have improved monitoring and awareness, a lasting resolution requires sustained, coordinated action across states. This includes providing financial support to farmers for alternative crop-residue management, expanding public transport, accelerating the transition to clean energy, enforcing strict dust-control regulations at construction sites, and improving waste management. Without such comprehensive and consistent efforts, Indian cities will continue to top the list of the world’s most polluted cities every November. Delhi’s status as the most polluted city in the world serves as a stark warning: India must stop viewing pollution as a seasonal news item or a localized urban issue, and instead recognize it as a national health emergency.


















