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As Tuesday dawned citizens of the planet's dirtiest urban center found themselves inhaling extremely polluted air that fell into the "severe" category.

Record-Breaking Air Quality Measurements

Multiple areas of Delhi showed an pollution measurement exceeding 500, which represents 10x the recommended threshold recommended by the WHO.

Certain monitoring stations, readings of dangerous airborne particles hit highs of 1,800, amounting to 15-20x higher than acceptable limits.

Pyrotechnics Prohibition and New Policy Shifts

For the past four years, the government had enforced a comprehensive restriction on the purchase and ignition of fireworks during the Festival of Lights due to their substantial impact to the hazardous haze that covers the city as the cold season sets in.

Yet recently, the newly elected regional leadership approached the supreme court to propose a relaxation of the prohibition.

The suggestion was allowing "environmentally conscious pyrotechnics" – which have been doubted by conservation groups as being only approximately one-third reduced emissions – as a balance between "heritage and environment".

Legal Ruling and Reality

Despite concerns of medical and ecological activists, judicial authorities agreed to the proposal, mandating that environmentally conscious fireworks could be ignited during limited time windows throughout the Diwali.

Throughout the festival evening, there was widespread flouting of the designated hours across the capital, with minimal monitoring regarding whether the pyrotechnics being used were actually the eco-friendly variety.

Many recording stations throughout the city showed air quality spiking around midnight to the most severe measurements seen during the festival in at least the past three years.

Cross-Border Effects

Extensive ignition of fireworks during Diwali also triggered a dispute with adjacent Pakistan, with representatives in Pakistan's Punjab province partly blaming deteriorating pollution levels in the city of Lahore on pollutants traveling from across the border following the celebrations.

Long-Standing Pollution Problem

Alarmingly severe levels of pollution in the capital have remained as a serious challenge for over a decade and a half, with the problem gradually deteriorating.

Around Diwali, the concentration of dangerous particulate matter in the atmosphere has been observed to increase dramatically to seventy percent above the worst readings ever documented in the Chinese city, which was formerly viewed as the globally most contaminated urban center.

Diverse Contamination Sources

The situation in Delhi is attributed to a combination of different contributors including transportation pollution, construction debris, building projects, waste incineration and haze from agricultural fires in neighbouring states of neighboring agricultural zones.

Throughout these areas, rural residents illegally set their fields on fire to clear them quickly, generating hazardous smog that remains stagnant over the city as colder air arrives.

Public Health and Economic Impact

The economic and health consequences on the roughly thirty-three million inhabitants residing in the Delhi area is significant, according to multiple investigations.

These hazardous conditions causes high levels of neurological, heart and circulatory and breathing diseases, and can even lead to oncological diseases.

The pollution is calculated to be accounting for 10,000 premature mortalities annually in the city.