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Tuesday brought residents of this heavily contaminated metropolis were faced with exposed to extremely polluted air that fell into the "critical" level.

Record-Breaking Air Quality Measurements

Several parts of the capital recorded an pollution measurement above 500, which represents ten times the recommended threshold recommended by the global health authority.

In some locations, concentrations of dangerous airborne particles reached peaks of 1800, representing 15 to 20 times exceeding acceptable levels.

Pyrotechnics Prohibition and Current Policy Shifts

For the past four years, authorities had maintained a total prohibition on the distribution and bursting of fireworks during the Festival of Lights due to their substantial impact to the deadly haze that covers the capital as winter begins.

Nevertheless recently, the current regional administration petitioned the supreme court to propose a modification of the ban.

They proposed allowing "environmentally conscious pyrotechnics" – which have been criticized by environmentalists as being only about 30% reduced emissions – as a middle ground between "tradition and environment".

Legal Ruling and Enforcement

To the disappointment of medical and ecological activists, judges complied with the appeal, mandating that eco-friendly pyrotechnics could be used during limited periods throughout the festival.

Throughout the festival evening, there was widespread violation of the time restrictions across the capital, with little enforcement regarding whether the fireworks being used were actually the eco-friendly type.

Many air quality sensors throughout the city recorded air quality reaching highest levels around late evening to some of the worst levels recorded during celebrations in at least the past three years.

International Effects

The proliferation of pyrotechnics during the festival also sparked a blame game with neighbouring Pakistan, with authorities in Pakistan's Punjab partially attributing deteriorating atmospheric conditions in Lahore on pollutants originating in neighboring India following the celebrations.

Persistent Pollution Problem

Extremely elevated readings of atmospheric toxins in Delhi have remained as a serious problem for over a decade and a half, with the problem gradually deteriorating.

During celebratory seasons, the amount of hazardous airborne contaminants in the environment has been documented to shoot up to 70% higher the peak records ever documented in China's capital, which was formerly viewed as the planet's dirtiest urban center.

Multiple Contamination Contributors

The situation in the city is resulting from a mix of various sources including automobile exhaust, airborne particles, development work, rubbish burning and haze from farm burning in neighbouring regions of farming communities.

Throughout these areas, agricultural workers illegally set their fields on fire to clear them quickly, generating hazardous pollution that becomes contained over the metropolitan area as colder air sets in.

Medical and Economic Consequences

The economic and health toll on the roughly thirty-three million inhabitants living in the capital region is enormous, according to various investigations.

The contaminated air leads to elevated rates of nervous system, cardiovascular and lung conditions, and can even lead to cancer.

Environmental contamination is calculated to be causing 10,000 early fatalities each year in the capital.