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On Tuesday morning inhabitants of this heavily contaminated metropolis were faced with breathing dangerously toxic air that registered in the "alarming" level.

Record-Breaking Air Quality Measurements

Various sections of the capital registered an AQI above 500, which equals ten times the healthy limit recommended by the WHO.

Certain monitoring stations, concentrations of toxic particulate matter soared to of 1,800, amounting to 15 to 20 times exceeding healthy limits.

Pyrotechnics Ban and Recent Changes

Beginning in 2020, authorities had enforced a total prohibition on the sale and use of firecrackers during the Festival of Lights due to their major role to the hazardous haze that blankets the city as winter approaches.

However in recent months, the current city government petitioned the highest court to propose a easing of the ban.

Officials advocated for allowing "eco-friendly fireworks" – which have been criticized by environmentalists as being only roughly 30 percent reduced emissions – as a compromise between "cultural practices and environment".

Court Ruling and Enforcement

Much to the frustration of public health and environmental activists, the court agreed to the appeal, specifying that green firecrackers could be set off during limited time windows throughout the Diwali.

On Monday night, there was extensive flouting of the time restrictions across the city, with little enforcement regarding whether the fireworks being used were actually the eco-friendly variety.

Many air quality sensors throughout the capital showed air quality reaching highest levels around midnight to extremely hazardous levels seen during the festival in at least three years.

Cross-Border Consequences

The proliferation of firecrackers during the festival also sparked a dispute with neighbouring the neighboring country, with authorities in Pakistani the Punjab region pointing to worsening pollution levels in the city of Lahore on hazardous particles originating in neighboring India following the festivities.

Persistent Pollution Crisis

The dangerously high readings of atmospheric toxins in the city have persisted as a significant problem for fifteen-plus years, with the problem showing no improvement.

During the festival period, the amount of hazardous airborne contaminants in the atmosphere has been observed to spike to seventy percent above the peak levels ever measured in the Chinese city, which was previously considered as the world's most polluted metropolis.

Diverse Contamination Sources

The problem in Delhi is attributed to a mix of various sources including heavy vehicle emissions, dust, development work, rubbish burning and smoke from crop residue ignition in adjacent areas of farming communities.

In these regions, farmers routinely burn crop residue to prepare for next season, producing toxic smog that becomes contained over the metropolitan area as winter air descends.

Health and Economic Consequences

The economic and health consequences on the approximately 33 million people living in the capital region is enormous, according to various investigations.

The contaminated air leads to high levels of nervous system, cardiovascular and respiratory disorders, and can even lead to malignancies.

Environmental contamination is estimated to be causing approximately 10k untimely fatalities annually in Delhi.