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As Tuesday dawned inhabitants of this heavily contaminated metropolis found themselves exposed to extremely polluted air that registered in the "critical" level.

Alarming Air Quality Levels

Various sections of the city showed an AQI exceeding 500, which equals ten times the recommended threshold recommended by the World Health Organization.

Certain monitoring stations, concentrations of toxic particulate matter soared to of 1,800, representing 15 to 20 times exceeding safe standards.

Pyrotechnics Restrictions and Recent Policy Shifts

Since 2020, the government had implemented a comprehensive restriction on the purchase and ignition of fireworks during Diwali due to their major role to the deadly smog that covers the city as the cold season sets in.

Nevertheless in recent months, the recently formed city administration appealed to the judicial authority to seek a relaxation of the ban.

The suggestion was allowing "environmentally conscious pyrotechnics" – previously doubted by environmental experts as being only roughly 30 percent less polluting – as a balance between "tradition and ecological concerns".

Court Decision and Reality

Much to the frustration of environmental and health activists, judicial authorities approved the appeal, specifying that green firecrackers could be set off during specific periods throughout the celebrations.

Throughout the festival evening, there was widespread disregard of the time restrictions across the city, with minimal monitoring regarding whether the pyrotechnics being used were actually the supposedly greener type.

Numerous monitoring devices throughout the capital showed contamination reaching highest levels around the night hours to some of the worst readings observed during Diwali in at least the past three years.

Regional Effects

The proliferation of pyrotechnics during the celebrations also initiated a blame game with bordering Pakistan, with authorities in Pakistan's Punjab pointing to declining pollution levels in the city of Lahore on pollutants traveling from neighboring India following the events.

Persistent Environmental Crisis

Extremely elevated concentrations of pollution in the capital have remained as a major issue for more than 15 years, with the condition showing no improvement.

Near celebratory seasons, the levels of hazardous airborne contaminants in the atmosphere has been observed to shoot up to significantly exceeding the peak records ever documented in Beijing, which was previously considered as the globally most contaminated urban center.

Multiple Contamination Contributors

The situation in Delhi is attributed to a mix of multiple factors including automobile exhaust, construction debris, development work, waste incineration and haze from crop residue ignition in neighbouring areas of neighboring agricultural zones.

In these regions, rural residents illegally set their fields on fire to prepare for next season, producing toxic haze that remains stagnant over the city as colder air sets in.

Medical and Financial Consequences

Both financial and medical toll on the roughly thirty-three million residents residing in the capital region is significant, according to multiple investigations.

The contaminated air results in increased incidence of neurological, cardiovascular and lung diseases, and can potentially cause cancer.

Environmental contamination is estimated to be accounting for approximately 10k untimely mortalities each year in Delhi.