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As Tuesday dawned residents of the planet's dirtiest urban center found themselves inhaling dangerously toxic air that registered in the "alarming" category.

Alarming Air Quality Levels

Various sections of the city recorded an AQI over 500, which represents 10x the recommended threshold established by the WHO.

Particular areas, readings of dangerous airborne particles hit highs of eighteen hundred, amounting to 15 to 20 times above safe levels.

Fireworks Restrictions and Recent Policy Shifts

Since 2020, officials had implemented a total prohibition on the sale and use of firecrackers during celebrations due to their significant contribution to the hazardous smog that blankets the city as colder weather begins.

However in recent months, the recently formed local government approached the supreme court to seek a modification of the ban.

Officials advocated for allowing "eco-friendly fireworks" – which have been questioned by environmentalists as being only about 30% lower impact – as a middle ground between "heritage and ecological concerns".

Legal Decision and Reality

Despite concerns of medical and ecological campaigners, judges complied with the proposal, mandating that eco-friendly pyrotechnics could be used during designated periods throughout the festival.

On Monday night, there was extensive flouting of the designated hours across the metropolis, with insufficient monitoring regarding whether the pyrotechnics being used were actually the supposedly greener version.

Numerous air quality sensors throughout Delhi recorded air quality peaking around late evening to the most severe measurements recorded during the festival in at least three years.

Cross-Border Implications

The widespread use of fireworks during Diwali also triggered a dispute with adjacent the neighboring country, with officials in Pakistan's Punjab pointing to declining pollution levels in their urban centers on contaminants coming from neighboring India following the events.

Chronic Pollution Crisis

The dangerously high levels of atmospheric toxins in Delhi have persisted as a significant issue for over a decade and a half, with the problem continuing to worsen.

During Diwali, the amount of hazardous particles in the air has been documented to shoot up to significantly exceeding the peak records ever measured in Beijing, which was previously viewed as the planet's dirtiest metropolis.

Multiple Pollution Sources

This crisis in the city is attributed to a convergence of multiple factors including transportation pollution, airborne particles, building projects, garbage fires and smoke from farm burning in neighbouring states of farming communities.

Throughout these areas, agricultural workers regularly ignite agricultural waste to clear them quickly, generating toxic haze that remains stagnant over the capital as colder air descends.

Health and Financial Toll

Both financial and medical toll on the roughly thirty-three million people living in the capital region is substantial, according to multiple studies.

These hazardous conditions leads to high levels of neurological, heart and circulatory and respiratory conditions, and can result in malignancies.

The pollution is estimated to be accounting for 10,000 premature mortalities each year in the city.