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Tuesday brought inhabitants of the world's most polluted city found themselves breathing extremely polluted air that fell into the "alarming" level.

Alarming Air Quality Levels

Multiple areas of the capital showed an AQI above 500, which translates to ten times the healthy threshold established by the WHO.

Particular areas, concentrations of toxic particulate matter hit highs of 1,800, representing fifteen to twenty times exceeding acceptable standards.

Firecracker Restrictions and Recent Changes

Since 2020, authorities had enforced a complete ban on the purchase and ignition of fireworks during Diwali due to their substantial impact to the hazardous pollution that engulfs the capital as winter approaches.

Yet earlier this year, the recently formed regional government appealed to the supreme court to seek a relaxation of the ban.

Officials advocated for allowing "eco-friendly fireworks" – previously questioned by environmental experts as being only about 30% less polluting – as a balance between "heritage and ecological concerns".

Judicial Verdict and Implementation

Much to the frustration of medical and ecological campaigners, judges complied with the appeal, specifying that green firecrackers could be used during designated time windows throughout the Diwali.

During the celebrations, there was widespread violation of the time restrictions across the capital, with little monitoring regarding whether the pyrotechnics being used were actually the supposedly greener version.

Numerous monitoring devices throughout the city showed air quality peaking around midnight to some of the worst measurements observed during the festival in at least recent memory.

Cross-Border Effects

Extensive ignition of fireworks during the celebrations also initiated a dispute with neighbouring the neighboring country, with officials in Pakistan's Punjab partly blaming deteriorating pollution levels in their urban centers on pollutants originating in India following the festivities.

Persistent Pollution Issue

The dangerously high concentrations of air contamination in the capital have remained as a significant problem for over a decade and a half, with the condition showing no improvement.

Near the festival period, the concentration of toxic particulate matter in the environment has been documented to shoot up to significantly exceeding the worst records ever recorded in the Chinese city, which was formerly viewed as the globally most contaminated metropolis.

Multiple Pollution Contributors

This crisis in Delhi is caused by a mix of different contributors including automobile exhaust, dust, building projects, waste incineration and pollutants from crop residue ignition in adjacent areas of neighboring agricultural zones.

Within these states, agricultural workers illegally ignite agricultural waste to prepare for next season, creating toxic smog that remains stagnant over the metropolitan area as colder air arrives.

Public Health and Financial Consequences

Both financial and medical toll on the nearly 33 million residents residing in the Delhi area is significant, according to multiple investigations.

These hazardous conditions results in increased incidence of neurological, cardiovascular and breathing conditions, and can potentially cause malignancies.

Environmental contamination is calculated to be responsible for ten thousand untimely deaths each year in Delhi.