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As Tuesday dawned inhabitants of this heavily contaminated metropolis encountered exposed to severely hazardous air that registered in the "critical" range.

Record-Breaking Air Quality Readings

Several parts of the city registered an pollution measurement exceeding 500, which translates to 10x the healthy limit recommended by the World Health Organization.

Certain monitoring stations, readings of dangerous airborne particles soared to of 1800, representing 15 to 20 times exceeding healthy limits.

Fireworks Restrictions and Recent Changes

For the past four years, the government had maintained a comprehensive restriction on the purchase and ignition of pyrotechnics during Diwali due to their substantial impact to the deadly pollution that engulfs the metropolis as winter begins.

Nevertheless recently, the current regional government appealed to the supreme court to seek a relaxation of the restrictions.

The suggestion was allowing "eco-friendly fireworks" – previously questioned by environmental experts as being only roughly 30 percent lower impact – as a balance between "heritage and environment".

Court Ruling and Enforcement

Much to the frustration of environmental and health activists, the court approved the proposal, stipulating that eco-friendly pyrotechnics could be set off during limited periods throughout the Diwali.

Throughout the festival evening, there was widespread violation of the time restrictions across the metropolis, with minimal monitoring regarding whether the fireworks being used were actually the eco-friendly version.

Many monitoring devices throughout Delhi registered pollution reaching highest levels around late evening to some of the worst measurements seen during celebrations in at least the past three years.

International Effects

The proliferation of pyrotechnics during Diwali also triggered a controversy with neighbouring the neighboring country, with authorities in Pakistani the Punjab region partially attributing deteriorating air quality in their urban centers on contaminants coming from India following the events.

Chronic Environmental Problem

Alarmingly severe concentrations of atmospheric toxins in the city have persisted as a major challenge for more than 15 years, with the problem showing no improvement.

Around the festival period, the concentration of toxic particulate matter in the environment has been documented to shoot up to 70% higher the worst levels ever measured in the Chinese city, which was formerly regarded as the world's most polluted city.

Diverse Pollution Contributors

This crisis in the capital is caused by a convergence of various sources including automobile exhaust, airborne particles, construction activities, rubbish burning and pollutants from farm burning in neighbouring regions of neighboring agricultural zones.

In these regions, rural residents regularly burn crop residue to prepare for next season, producing hazardous haze that becomes contained over the metropolitan area as colder air descends.

Health and Financial Toll

Both financial and medical impact on the approximately 33 million residents residing in the Delhi area is enormous, according to various studies.

The contaminated air leads to increased incidence of neurological, cardiovascular and respiratory conditions, and can potentially cause malignancies.

Environmental contamination is projected to be causing ten thousand untimely fatalities annually in the capital.