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On Tuesday morning residents of this heavily contaminated metropolis were faced with inhaling severely hazardous air that was classified as the "severe" range.

Record-Breaking Air Quality Levels

Various sections of Delhi recorded an air quality index exceeding 500, which translates to ten times the recommended level recommended by the World Health Organization.

Particular areas, concentrations of toxic particulate matter soared to of eighteen hundred, representing 15-20x higher than acceptable limits.

Pyrotechnics Ban and Recent Policy Shifts

For the past four years, the government had maintained a complete ban on the sale and use of firecrackers during Diwali due to their significant contribution to the dangerous pollution that blankets the capital as colder weather sets in.

Nevertheless earlier this year, the newly elected city administration appealed to the supreme court to seek a easing of the prohibition.

Officials advocated for allowing "green crackers" – historically criticized by environmentalists as being only approximately one-third reduced emissions – as a balance between "heritage and environment".

Legal Ruling and Enforcement

Despite concerns of public health and environmental activists, judges complied with the appeal, mandating that environmentally conscious fireworks could be used during designated time windows throughout the festival.

During the celebrations, there was extensive disregard of the regulated periods across the metropolis, with insufficient monitoring regarding whether the firecrackers being used were actually the supposedly greener variety.

Numerous monitoring devices throughout the capital registered air quality reaching highest levels around late evening to extremely hazardous levels recorded during Diwali in at least the past three years.

Regional Consequences

The widespread use of fireworks during the festival also initiated a controversy with bordering Pakistan, with authorities in Pakistani Punjab pointing to declining pollution levels in Lahore on hazardous particles coming from across the border following the events.

Chronic Pollution Problem

Extremely elevated levels of air contamination in the capital have remained as a significant challenge for fifteen-plus years, with the problem continuing to worsen.

During the festival period, the concentration of toxic airborne contaminants in the environment has been observed to increase dramatically to 70% higher the most severe records ever recorded in the Chinese city, which was formerly regarded as the world's most polluted city.

Various Contamination Contributors

This crisis in Delhi is attributed to a mix of different contributors including transportation pollution, dust, development work, rubbish burning and smoke from agricultural fires in adjacent regions of Punjab and Haryana.

Within these states, farmers regularly set their fields on fire to prepare for next season, creating dangerous pollution that then gets trapped over the city as colder air arrives.

Public Health and Financial Impact

The economic and health consequences on the approximately 33 million residents calling home the metropolitan zone is significant, according to various studies.

This pollution results in high levels of nervous system, heart and circulatory and lung disorders, and can result in malignancies.

The pollution is estimated to be accounting for ten thousand premature mortalities per year in the city.