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As Tuesday dawned citizens of this heavily contaminated metropolis were faced with exposed to dangerously toxic air that registered in the "severe" range.

Extremely High Pollution Measurements

Several parts of Delhi recorded an pollution measurement above 500, which translates to ten times the recommended level set by the WHO.

Particular areas, concentrations of dangerous airborne particles hit highs of 1,800, amounting to 15-20x higher than safe limits.

Fireworks Restrictions and Recent Developments

Since 2020, the government had maintained a total prohibition on the purchase and ignition of fireworks during celebrations due to their major role to the hazardous pollution that blankets the metropolis as winter sets in.

However recently, the current regional government approached the supreme court to propose a easing of the prohibition.

The suggestion was allowing "environmentally conscious pyrotechnics" – historically doubted by environmental experts as being only approximately one-third less polluting – as a balance between "tradition and ecological concerns".

Judicial Decision and Reality

To the disappointment of environmental and health advocates, the court agreed to the request, mandating that green firecrackers could be ignited during specific periods throughout the celebrations.

During the celebrations, there was widespread violation of the regulated periods across the metropolis, with insufficient regulation regarding whether the fireworks being used were actually the eco-friendly version.

Many air quality sensors throughout the city recorded contamination peaking around late evening to extremely hazardous readings seen during Diwali in at least three years.

Cross-Border Effects

The proliferation of pyrotechnics during the festival also sparked a controversy with adjacent Pakistan, with authorities in Pakistan's Punjab province partially attributing worsening atmospheric conditions in their urban centers on hazardous particles originating in neighboring India following the celebrations.

Long-Standing Environmental Issue

Alarmingly severe levels of pollution in Delhi have continued as a significant issue for more than 15 years, with the problem continuing to worsen.

During celebratory seasons, the amount of toxic particulate matter in the air has been observed to increase dramatically to 70% higher the most severe records ever measured in China's capital, which was formerly viewed as the world's most polluted urban center.

Various Pollution Contributors

The problem in the city is attributed to a combination of various sources including transportation pollution, dust, building projects, waste incineration and smoke from farm burning in adjacent states of Punjab and Haryana.

Within these states, agricultural workers regularly ignite agricultural waste to clear them quickly, generating toxic smog that remains stagnant over the capital as cooler air sets in.

Medical and Financial Consequences

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

The contaminated air leads to elevated rates of neurological, heart and circulatory and respiratory disorders, and can potentially cause cancer.

The pollution is estimated to be causing 10,000 untimely fatalities each year in the capital.