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As Tuesday dawned inhabitants of this heavily contaminated metropolis encountered breathing dangerously toxic air that was classified as the "severe" range.

Alarming Air Quality Measurements

Various sections of the city recorded an air quality index over 500, which translates to ten times the recommended level established by the World Health Organization.

In some locations, readings of toxic particulate matter reached peaks of eighteen hundred, representing fifteen to twenty times exceeding safe standards.

Firecracker Prohibition and Recent Developments

Beginning in 2020, authorities had enforced a comprehensive restriction on the sale and use of firecrackers during Diwali due to their substantial impact to the dangerous haze that covers the metropolis as winter sets in.

Yet in recent months, the newly elected city government approached the highest court to request a easing of the restrictions.

Officials advocated for allowing "eco-friendly fireworks" – which have been criticized by conservation groups as being only about 30% lower impact – as a compromise between "heritage and environment".

Legal Decision and Reality

Despite concerns of public health and environmental advocates, judicial authorities approved the appeal, stipulating that green firecrackers could be used during designated time windows throughout the celebrations.

On Monday night, there was considerable violation of the designated hours across the capital, with insufficient regulation regarding whether the pyrotechnics being used were actually the more environmentally friendly type.

Several air quality sensors throughout the city recorded air quality spiking around midnight to the most severe levels recorded during the festival in at least three years.

Cross-Border Consequences

The proliferation of pyrotechnics during the festival also triggered a blame game with adjacent Pakistan, with officials in Pakistani Punjab partly blaming declining air quality in the city of Lahore on hazardous particles traveling from India following the events.

Long-Standing Environmental Crisis

Alarmingly severe readings of pollution in the city have remained as a major challenge for more than 15 years, with the situation continuing to worsen.

Near the festival period, the amount of hazardous airborne contaminants in the air has been found to increase dramatically to significantly exceeding the worst levels ever documented in the Chinese city, which was formerly viewed as the planet's dirtiest metropolis.

Diverse Pollution Factors

The problem in Delhi is attributed to a combination of multiple factors including transportation pollution, airborne particles, construction activities, rubbish burning and smoke from farm burning in neighbouring areas of Punjab and Haryana.

Within these states, agricultural workers illegally set their fields on fire to prepare for next season, generating toxic haze that remains stagnant over the metropolitan area as cooler air descends.

Public Health and Economic Toll

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

This pollution results in high levels of nervous system, heart and circulatory and lung disorders, and can result in malignancies.

Air quality crisis is calculated to be responsible for approximately 10k early fatalities each year in the capital.