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As Tuesday dawned citizens of this heavily contaminated metropolis found themselves inhaling severely hazardous air that was classified as the "severe" level.

Alarming Pollution Readings

Various sections of the capital recorded an AQI exceeding 500, which translates to 10x the recommended threshold set by the World Health Organization.

In some locations, levels of toxic particulate matter reached peaks of 1800, amounting to fifteen to twenty times exceeding acceptable limits.

Fireworks Ban and Recent Developments

For the past four years, the government had implemented a complete ban on the sale and use of pyrotechnics during celebrations due to their significant contribution to the hazardous smog that covers the city as the cold season sets in.

However earlier this year, the newly elected regional administration petitioned the supreme court to seek a modification of the restrictions.

Officials advocated for allowing "environmentally conscious pyrotechnics" – which have been questioned by environmental experts as being only roughly 30 percent lower impact – as a balance between "heritage and ecological concerns".

Legal Decision and Enforcement

Despite concerns of medical and ecological advocates, judges complied with the appeal, mandating that green firecrackers could be ignited during limited time windows throughout the Diwali.

On Monday night, there was considerable violation of the designated hours across the metropolis, with insufficient enforcement regarding whether the firecrackers being used were actually the supposedly greener type.

Many recording stations throughout Delhi showed air quality spiking around the night hours to the most severe readings recorded during Diwali in at least the past three years.

International Implications

Extensive ignition of firecrackers during Diwali also sparked a controversy with neighbouring the neighboring country, with officials in Pakistani Punjab pointing to declining air quality in the city of Lahore on hazardous particles traveling from neighboring India following the festivities.

Long-Standing Pollution Problem

Alarmingly severe readings of pollution in Delhi have remained as a serious issue for fifteen-plus years, with the problem continuing to worsen.

Around celebratory seasons, the levels of hazardous particulate matter in the atmosphere has been documented to increase dramatically to seventy percent above the most severe readings ever measured in Beijing, which was formerly considered as the world's most polluted metropolis.

Diverse Contamination Factors

This crisis in Delhi is resulting from a mix of various sources including transportation pollution, airborne particles, development work, rubbish burning and pollutants from farm burning in adjacent areas of farming communities.

Within these states, farmers routinely set their fields on fire to clear them quickly, producing dangerous pollution that then gets trapped over the city as winter air sets in.

Medical and Economic Consequences

Public health and economic toll on the approximately 33 million residents calling home the metropolitan zone is enormous, according to various investigations.

The contaminated air leads to high levels of nervous system, heart and circulatory and breathing conditions, and can potentially cause malignancies.

The pollution is projected to be accounting for 10,000 untimely fatalities each year in the capital.