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As Tuesday dawned citizens of the world's most polluted city encountered inhaling extremely polluted air that was classified as the "severe" range.

Alarming Pollution Levels

Multiple areas of Delhi recorded an AQI above 500, which represents a tenfold increase over the recommended threshold established by the global health authority.

In some locations, concentrations of toxic particulate matter soared to of 1800, equating to 15-20x higher than acceptable limits.

Fireworks Restrictions and Current Developments

Beginning in 2020, officials had maintained a complete ban on the purchase and ignition of firecrackers during celebrations due to their major role to the dangerous smog that blankets the capital as winter approaches.

However recently, the current local leadership appealed to the highest court to seek a easing of the prohibition.

The suggestion was allowing "environmentally conscious pyrotechnics" – historically doubted by environmentalists as being only approximately one-third reduced emissions – as a balance between "tradition and public health".

Judicial Decision and Implementation

Despite concerns of public health and environmental advocates, the court agreed to the request, stipulating that environmentally conscious fireworks could be ignited during limited hours throughout the Diwali.

During the celebrations, there was considerable flouting of the regulated periods across the capital, with insufficient monitoring regarding whether the fireworks being used were actually the eco-friendly type.

Numerous air quality sensors throughout the capital registered contamination spiking around midnight to the most severe measurements observed during Diwali in at least recent memory.

International Implications

The proliferation of firecrackers during the festival also triggered a dispute with bordering Pakistan, with officials in Pakistani Punjab province partially attributing deteriorating pollution levels in the city of Lahore on contaminants traveling from neighboring India following the festivities.

Persistent Pollution Problem

The dangerously high levels of pollution in the capital have persisted as a major challenge for over a decade and a half, with the condition showing no improvement.

Near Diwali, the concentration of dangerous particulate matter in the atmosphere has been observed to increase dramatically to 70% higher the peak levels ever measured in China's capital, which was previously considered as the planet's dirtiest urban center.

Diverse Pollution Contributors

The situation in the capital is caused by a mix of different contributors including automobile exhaust, dust, building projects, garbage fires and haze from agricultural fires in neighbouring regions of neighboring agricultural zones.

Throughout these areas, rural residents regularly ignite agricultural waste to prepare for next season, generating toxic smog that remains stagnant over the city as colder air sets in.

Medical and Economic Toll

The economic and health toll on the roughly thirty-three million inhabitants calling home the metropolitan zone is significant, according to numerous studies.

This pollution leads to elevated rates of neurological, cardiovascular and breathing diseases, and can potentially cause oncological diseases.

The pollution is estimated to be causing approximately 10k premature fatalities annually in the city.