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On Tuesday morning inhabitants of this heavily contaminated metropolis were faced with exposed to dangerously toxic air that was classified as the "critical" level.

Alarming Air Quality Readings

Various sections of the capital showed an AQI above 500, which equals a tenfold increase over the safe level established by the World Health Organization.

Particular areas, concentrations of PM2.5 and PM10 hit highs of 1800, amounting to 15-20x above safe standards.

Fireworks Ban and New Developments

Beginning in 2020, officials had implemented a comprehensive restriction on the distribution and bursting of firecrackers during the Festival of Lights due to their major role to the deadly pollution that engulfs the city as the cold season sets in.

Nevertheless recently, the current city leadership appealed to the supreme court to propose a easing of the ban.

They proposed allowing "eco-friendly fireworks" – which have been questioned by environmental experts as being only about 30% reduced emissions – as a balance between "heritage and environment".

Court Verdict and Enforcement

To the disappointment of environmental and health campaigners, judges agreed to the request, mandating that green firecrackers could be set off during specific time windows throughout the Diwali.

On Monday night, there was considerable disregard of the designated hours across the capital, with insufficient regulation regarding whether the pyrotechnics being used were actually the supposedly greener variety.

Many air quality sensors throughout the capital recorded air quality spiking around late evening to the most severe levels observed during celebrations in at least recent memory.

Cross-Border Consequences

The widespread use of fireworks during Diwali also triggered a controversy with bordering Pakistan, with officials in Pakistan's Punjab province partially attributing declining air quality in Lahore on contaminants originating in neighboring India following the celebrations.

Persistent Environmental Issue

Alarmingly severe levels of atmospheric toxins in the city have persisted as a significant issue for fifteen-plus years, with the condition gradually deteriorating.

During the festival period, the concentration of dangerous particulate matter in the environment has been found to shoot up to significantly exceeding the most severe readings ever documented in the Chinese city, which was once regarded as the globally most contaminated metropolis.

Diverse Pollution Factors

The situation in Delhi is attributed to a combination of different contributors including transportation pollution, construction debris, development work, garbage fires and pollutants from farm burning in nearby areas of farming communities.

Throughout these areas, rural residents regularly ignite agricultural waste to clear them quickly, creating dangerous smog that remains stagnant over the capital as colder air sets in.

Health and Economic Consequences

Public health and economic toll on the approximately 33 million inhabitants living in the capital region is enormous, according to numerous investigations.

These hazardous conditions results in elevated rates of nervous system, heart and circulatory and lung conditions, and can even lead to oncological diseases.

Environmental contamination is estimated to be responsible for approximately 10k premature fatalities per year in Delhi.