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As Tuesday dawned residents of the world's most polluted city found themselves exposed to extremely polluted air that was classified as the "alarming" category.

Alarming Pollution Levels

Several parts of Delhi registered an AQI over 500, which translates to 10x the recommended level set by the World Health Organization.

Certain monitoring stations, concentrations of toxic particulate matter reached peaks of eighteen hundred, representing 15-20x higher than acceptable limits.

Pyrotechnics Ban and New Developments

Since 2020, officials had maintained a total prohibition on the purchase and ignition of fireworks during the Festival of Lights due to their major role to the deadly pollution that covers the capital as colder weather begins.

Nevertheless in recent months, the recently formed local administration petitioned the judicial authority to propose a modification of the restrictions.

They proposed allowing "environmentally conscious pyrotechnics" – previously criticized by environmental experts as being only approximately one-third less polluting – as a middle ground between "heritage and environment".

Court Ruling and Enforcement

Much to the frustration of environmental and health campaigners, the court complied with the request, specifying that green firecrackers could be used during limited time windows throughout the Diwali.

On Monday night, there was considerable violation of the designated hours across the metropolis, with minimal regulation regarding whether the pyrotechnics being used were actually the supposedly greener version.

Several air quality sensors throughout the capital registered contamination reaching highest levels around late evening to extremely hazardous levels observed during the festival in at least recent memory.

International Consequences

The proliferation of fireworks during Diwali also sparked a blame game with adjacent Pakistan, with officials in Pakistani the Punjab region partially attributing declining pollution levels in the city of Lahore on hazardous particles traveling from neighboring India following the events.

Long-Standing Environmental Crisis

Extremely elevated levels of pollution in Delhi have remained as a major challenge for fifteen-plus years, with the situation gradually deteriorating.

Around Diwali, the concentration of dangerous particulate matter in the air has been documented to spike to seventy percent above the most severe readings ever measured in the Chinese city, which was once regarded as the planet's dirtiest metropolis.

Diverse Contamination Sources

The problem in Delhi is caused by a convergence of multiple factors including automobile exhaust, construction debris, construction activities, waste incineration and haze from crop residue ignition in adjacent regions of neighboring agricultural zones.

Within these states, rural residents illegally burn crop residue to prepare for next season, generating hazardous haze that then gets trapped over the capital as colder air descends.

Medical and Financial Impact

Both financial and medical toll on the roughly thirty-three million inhabitants living in the metropolitan zone is enormous, according to numerous research.

These hazardous conditions results in elevated rates of nervous system, heart and circulatory and respiratory diseases, and can even lead to cancer.

The pollution is projected to be accounting for approximately 10k early fatalities per year in the capital.