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Tuesday brought residents of this heavily contaminated metropolis were faced with inhaling extremely polluted air that registered in the "severe" category.

Alarming Air Quality Readings

Multiple areas of the city recorded an air quality index exceeding 500, which represents 10x the healthy level established by the World Health Organization.

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

Firecracker Ban and New Developments

Since 2020, authorities had implemented a complete ban on the distribution and bursting of pyrotechnics during celebrations due to their major role to the dangerous pollution that blankets the metropolis as winter approaches.

Yet earlier this year, the recently formed regional government appealed to the highest court to request a easing of the prohibition.

Officials advocated for allowing "green crackers" – historically doubted by conservation groups as being only about 30% lower impact – as a compromise between "heritage and public health".

Judicial Decision and Implementation

Despite concerns of environmental and health activists, the court approved the appeal, stipulating that eco-friendly pyrotechnics could be ignited during limited time windows throughout the festival.

During the celebrations, there was considerable violation of the designated hours across the city, with minimal enforcement regarding whether the pyrotechnics being used were actually the more environmentally friendly type.

Numerous air quality sensors throughout the capital recorded air quality reaching highest levels around the night hours to extremely hazardous measurements observed during celebrations in at least recent memory.

Regional Effects

The widespread use of fireworks during Diwali also sparked a blame game with adjacent Pakistan, with authorities in Pakistani Punjab province partly blaming deteriorating atmospheric conditions in their urban centers on contaminants originating in India following the events.

Persistent Environmental Crisis

Alarmingly severe readings of air contamination in Delhi have remained as a serious problem for over a decade and a half, with the problem gradually deteriorating.

Near the festival period, the amount of dangerous airborne contaminants in the atmosphere has been observed to increase dramatically to seventy percent above the worst levels ever measured in Beijing, which was previously viewed as the planet's dirtiest urban center.

Multiple Contamination Sources

The situation in the city is resulting from a mix of different contributors including automobile exhaust, construction debris, building projects, rubbish burning and smoke from crop residue ignition in neighbouring states of farming communities.

Within these states, rural residents routinely ignite agricultural waste to clear them quickly, producing hazardous pollution that becomes contained over the city as cooler air sets in.

Medical and Financial Consequences

The economic and health consequences on the approximately 33 million residents calling home the capital region is enormous, according to various research.

The contaminated air leads to increased incidence of neurological, heart and circulatory and lung conditions, and can potentially cause oncological diseases.

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