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On Tuesday morning citizens of this heavily contaminated metropolis were faced with breathing extremely polluted air that was classified as the "severe" range.

Extremely High Air Quality Levels

Various sections of the city recorded an AQI exceeding 500, which represents 10x the healthy level set by the World Health Organization.

Particular areas, concentrations of dangerous airborne particles soared to of 1,800, amounting to 15 to 20 times exceeding acceptable standards.

Firecracker Restrictions and Recent Policy Shifts

For the past four years, the government had enforced a complete ban on the sale and use of firecrackers during the Festival of Lights due to their substantial impact to the dangerous smog that engulfs the capital as colder weather sets in.

Yet earlier this year, the recently formed city administration petitioned the judicial authority to request a modification of the restrictions.

Officials advocated for allowing "green crackers" – previously criticized by environmental experts as being only about 30% less polluting – as a balance between "heritage and ecological concerns".

Legal Decision and Reality

Much to the frustration of medical and ecological advocates, judges agreed to the proposal, stipulating that eco-friendly pyrotechnics could be ignited during designated hours throughout the celebrations.

During the celebrations, there was extensive violation of the time restrictions across the city, with little enforcement regarding whether the fireworks being used were actually the supposedly greener type.

Many air quality sensors throughout the city showed contamination reaching highest levels around midnight to extremely hazardous levels recorded during Diwali in at least the past three years.

Cross-Border Implications

The widespread use of firecrackers during the festival also triggered a dispute with bordering Pakistan, with representatives in Pakistan's the Punjab region partially attributing declining atmospheric conditions in their urban centers on hazardous particles originating in India following the events.

Persistent Pollution Issue

The dangerously high concentrations of pollution in Delhi have continued as a major challenge for fifteen-plus years, with the problem showing no improvement.

During the festival period, the concentration of toxic particles in the environment has been found to spike to seventy percent above the most severe levels ever recorded in the Chinese city, which was once regarded as the world's most polluted urban center.

Various Pollution Sources

The situation in the capital is resulting from a combination of various sources including automobile exhaust, dust, construction activities, garbage fires and pollutants from crop residue ignition in nearby regions of Punjab and Haryana.

Throughout these areas, rural residents illegally ignite agricultural waste to expedite field preparation, producing hazardous pollution that remains stagnant over the city as cooler air sets in.

Medical and Economic Impact

Public health and economic impact on the roughly thirty-three million residents living in the capital region is significant, according to various research.

This pollution results in elevated rates of neurological, heart and circulatory and breathing conditions, and can even lead to oncological diseases.

The pollution is calculated to be responsible for 10,000 untimely fatalities annually in the capital.