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As Tuesday dawned citizens of this heavily contaminated metropolis were faced with exposed to severely hazardous air that registered in the "severe" category.

Record-Breaking Air Quality Measurements

Various sections of the city recorded an air quality index exceeding 500, which represents a tenfold increase over the recommended threshold established by the global health authority.

In some locations, levels of toxic particulate matter reached peaks of eighteen hundred, amounting to fifteen to twenty times exceeding safe standards.

Fireworks Prohibition and Current Policy Shifts

For the past four years, authorities had maintained a comprehensive restriction on the purchase and ignition of firecrackers during the Festival of Lights due to their major role to the hazardous haze that covers the city as colder weather sets in.

Nevertheless in recent months, the current regional leadership appealed to the judicial authority to propose a easing of the restrictions.

The suggestion was allowing "eco-friendly fireworks" – historically questioned by environmental experts as being only roughly 30 percent less polluting – as a compromise between "cultural practices and environment".

Legal Decision and Enforcement

Despite concerns of medical and ecological advocates, judicial authorities approved the appeal, mandating that eco-friendly pyrotechnics could be ignited during designated time windows throughout the festival.

On Monday night, there was considerable flouting of the time restrictions across the city, with insufficient regulation regarding whether the firecrackers being used were actually the eco-friendly variety.

Several air quality sensors throughout the city showed air quality spiking around late evening to some of the worst readings recorded during celebrations in at least the past three years.

Cross-Border Implications

Extensive ignition of pyrotechnics during Diwali also triggered a blame game with neighbouring the neighboring country, with authorities in Pakistani Punjab partially attributing deteriorating atmospheric conditions in Lahore on hazardous particles coming from neighboring India following the festivities.

Long-Standing Environmental Crisis

The dangerously high concentrations of atmospheric toxins in the capital have remained as a major issue for fifteen-plus years, with the situation gradually deteriorating.

Near the festival period, the amount of hazardous airborne contaminants in the atmosphere has been documented to spike to significantly exceeding the most severe records ever recorded in the Chinese city, which was formerly considered as the globally most contaminated urban center.

Various Contamination Factors

This crisis in the city is caused by a convergence of multiple factors including transportation pollution, dust, building projects, garbage fires and pollutants from agricultural fires in adjacent regions of neighboring agricultural zones.

In these regions, rural residents routinely burn crop residue to clear them quickly, creating hazardous smog that becomes contained over the metropolitan area as cooler air arrives.

Public Health and Economic Consequences

The economic and health toll on the nearly 33 million inhabitants residing in the metropolitan zone is significant, according to numerous studies.

The contaminated air causes high levels of neurological, heart and circulatory and breathing conditions, and can result in malignancies.

Air quality crisis is estimated to be responsible for approximately 10k early fatalities per year in the capital.