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As Tuesday dawned inhabitants of this heavily contaminated metropolis found themselves exposed to extremely polluted air that was classified as the "alarming" range.

Alarming Pollution Measurements

Multiple areas of the capital recorded an AQI above 500, which represents 10x the safe threshold established by the global health authority.

In some locations, readings of PM2.5 and PM10 reached peaks of 1,800, representing 15-20x above acceptable levels.

Firecracker Ban and Recent Policy Shifts

Since 2020, officials had maintained a total prohibition on the sale and use of pyrotechnics during the Festival of Lights due to their major role to the deadly smog that blankets the capital as the cold season begins.

However recently, the current city leadership petitioned the supreme court to propose a modification of the restrictions.

Officials advocated for allowing "environmentally conscious pyrotechnics" – historically doubted by environmentalists as being only roughly 30 percent lower impact – as a middle ground between "tradition and public health".

Court Decision and Implementation

To the disappointment of environmental and health advocates, the court approved the proposal, mandating that eco-friendly pyrotechnics could be set off during limited time windows throughout the Diwali.

Throughout the festival evening, there was extensive violation of the designated hours across the city, with little regulation regarding whether the firecrackers being used were actually the eco-friendly type.

Numerous recording stations throughout Delhi registered pollution spiking around the night hours to the most severe measurements recorded during Diwali in at least recent memory.

Regional Consequences

The widespread use of pyrotechnics during the celebrations also triggered a blame game with adjacent the neighboring country, with representatives in Pakistani the Punjab region pointing to deteriorating atmospheric conditions in Lahore on contaminants traveling from neighboring India following the events.

Persistent Pollution Issue

Alarmingly severe concentrations of pollution in Delhi have remained as a major issue for more than 15 years, with the condition showing no improvement.

During celebratory seasons, the amount of toxic particles in the atmosphere has been observed to shoot up to significantly exceeding the peak levels ever documented in China's capital, which was formerly regarded as the world's most polluted metropolis.

Diverse Contamination Factors

This crisis in Delhi is caused by a convergence of various sources including transportation pollution, airborne particles, building projects, garbage fires and smoke from crop residue ignition in neighbouring areas of farming communities.

In these regions, rural residents illegally set their fields on fire to expedite field preparation, producing toxic pollution that becomes contained over the metropolitan area as winter air arrives.

Medical and Economic Impact

The economic and health toll on the nearly 33 million inhabitants living in the Delhi area is enormous, according to multiple research.

These hazardous conditions results in high levels of neurological, heart and circulatory and lung disorders, and can even lead to oncological diseases.

Air quality crisis is estimated to be causing approximately 10k untimely fatalities each year in the capital.