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On Tuesday morning residents of the planet's dirtiest urban center found themselves breathing dangerously toxic air that registered in the "severe" category.

Record-Breaking Air Quality Levels

Several parts of Delhi showed an AQI over 500, which represents a tenfold increase over the recommended limit established by the global health authority.

Certain monitoring stations, concentrations of toxic particulate matter soared to of eighteen hundred, representing 15-20x above healthy limits.

Fireworks Ban and Recent Policy Shifts

Beginning in 2020, authorities had enforced a complete ban on the distribution and bursting of firecrackers during Diwali due to their substantial impact to the hazardous smog that blankets the capital as the cold season begins.

However earlier this year, the recently formed city administration approached the supreme court to propose a modification of the prohibition.

The suggestion was allowing "green crackers" – previously doubted by environmentalists as being only approximately one-third less polluting – as a balance between "cultural practices and public health".

Court Decision and Reality

Much to the frustration of public health and environmental advocates, the court agreed to the request, specifying that green firecrackers could be used during designated time windows throughout the Diwali.

Throughout the festival evening, there was extensive disregard of the designated hours across the capital, with insufficient enforcement regarding whether the firecrackers being used were actually the supposedly greener variety.

Many air quality sensors throughout Delhi recorded pollution spiking around late evening to the most severe measurements seen during the festival in at least three years.

Cross-Border Consequences

The proliferation of pyrotechnics during Diwali also sparked a blame game with neighbouring Pakistan, with officials in Pakistan's the Punjab region pointing to deteriorating atmospheric conditions in the city of Lahore on contaminants originating in India following the events.

Chronic Pollution Problem

Alarmingly severe concentrations of air contamination in the capital have continued as a serious issue for fifteen-plus years, with the condition gradually deteriorating.

Around Diwali, the levels of dangerous particles in the air has been documented to shoot up to 70% higher the peak records ever documented in Beijing, which was formerly viewed as the planet's dirtiest metropolis.

Multiple Contamination Sources

The problem in Delhi is attributed to a combination of different contributors including automobile exhaust, dust, construction activities, garbage fires and smoke from crop residue ignition in nearby areas of neighboring agricultural zones.

Within these states, agricultural workers regularly ignite agricultural waste to expedite field preparation, generating hazardous smog that remains stagnant over the metropolitan area as colder air arrives.

Medical and Economic Toll

The economic and health impact on the nearly 33 million residents residing in the Delhi area is substantial, according to numerous investigations.

These hazardous conditions causes elevated rates of neurological, cardiovascular and respiratory conditions, and can even lead to malignancies.

Environmental contamination is estimated to be responsible for approximately 10k premature fatalities per year in the capital.