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Tuesday brought inhabitants of the world's most polluted city encountered breathing extremely polluted air that registered in the "critical" category.

Record-Breaking Air Quality Measurements

Various sections of the capital recorded an AQI above 500, which represents ten times the safe threshold recommended by the global health authority.

Certain monitoring stations, readings of PM2.5 and PM10 reached peaks of eighteen hundred, equating to 15 to 20 times above safe levels.

Fireworks Restrictions and Recent Policy Shifts

Beginning in 2020, the government had enforced a comprehensive restriction on the sale and use of fireworks during the Festival of Lights due to their substantial impact to the deadly haze that covers the metropolis as winter begins.

Nevertheless earlier this year, the newly elected city administration approached the judicial authority to propose a relaxation of the ban.

They proposed allowing "eco-friendly fireworks" – previously questioned by environmentalists as being only roughly 30 percent reduced emissions – as a compromise between "cultural practices and ecological concerns".

Legal Verdict and Enforcement

Despite concerns of public health and environmental campaigners, judicial authorities agreed to the proposal, mandating that green firecrackers could be used during limited hours throughout the Diwali.

During the celebrations, there was extensive flouting of the designated hours across the city, with insufficient enforcement regarding whether the pyrotechnics being used were actually the more environmentally friendly variety.

Several recording stations throughout Delhi registered pollution spiking around late evening to some of the worst levels observed during celebrations in at least the past three years.

Regional Implications

Extensive ignition of pyrotechnics during Diwali also initiated a controversy with bordering the neighboring country, with authorities in Pakistani Punjab province partly blaming worsening pollution levels in their urban centers on pollutants traveling from across the border following the celebrations.

Chronic Environmental Problem

The dangerously high levels of pollution in Delhi have persisted as a major issue for fifteen-plus years, with the problem gradually deteriorating.

During the festival period, the concentration of dangerous airborne contaminants in the environment has been observed to shoot up to 70% higher the worst records ever recorded in Beijing, which was previously regarded as the planet's dirtiest city.

Diverse Contamination Sources

The situation in the capital is caused by a convergence of multiple factors including transportation pollution, construction debris, building projects, garbage fires and haze from agricultural fires in adjacent regions of neighboring agricultural zones.

In these regions, farmers illegally set their fields on fire to prepare for next season, creating toxic pollution that remains stagnant over the city as winter air sets in.

Medical and Economic Toll

The economic and health consequences on the nearly 33 million residents calling home the metropolitan zone is significant, according to multiple studies.

The contaminated air results in elevated rates of nervous system, heart and circulatory and breathing conditions, and can even lead to malignancies.

The pollution is estimated to be responsible for ten thousand untimely fatalities annually in the city.