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Tuesday brought inhabitants of the planet's dirtiest urban center encountered inhaling dangerously toxic air that fell into the "critical" range.

Record-Breaking Air Quality Readings

Multiple areas of Delhi registered an air quality index exceeding 500, which represents 10x the healthy level established by the WHO.

Particular areas, levels of toxic particulate matter reached peaks of 1800, equating to 15 to 20 times above acceptable levels.

Pyrotechnics Restrictions and Current Policy Shifts

Beginning in 2020, authorities had enforced a complete ban on the sale and use of fireworks during celebrations due to their substantial impact to the deadly haze that covers the city as the cold season begins.

Nevertheless earlier this year, the current regional administration appealed to the supreme court to seek a modification of the prohibition.

Officials advocated for allowing "eco-friendly fireworks" – historically doubted by conservation groups as being only roughly 30 percent reduced emissions – as a middle ground between "heritage and ecological concerns".

Judicial Verdict and Reality

Much to the frustration of environmental and health campaigners, judicial authorities approved the proposal, mandating that green firecrackers could be ignited during specific periods throughout the Diwali.

During the celebrations, there was extensive disregard of the designated hours across the city, with insufficient enforcement regarding whether the pyrotechnics being used were actually the more environmentally friendly variety.

Numerous air quality sensors throughout Delhi recorded air quality reaching highest levels around late evening to some of the worst levels seen during the festival in at least the past three years.

Regional Effects

The proliferation of pyrotechnics during the celebrations also sparked a controversy with neighbouring Pakistan, with authorities in Pakistan's the Punjab region partly blaming deteriorating air quality in the city of Lahore on pollutants coming from neighboring India following the festivities.

Long-Standing Environmental Issue

The dangerously high levels of pollution in the capital have remained as a major challenge for fifteen-plus years, with the condition continuing to worsen.

Around Diwali, the amount of toxic particles in the air has been documented to shoot up to 70% higher the worst readings ever documented in the Chinese city, which was formerly considered as the planet's dirtiest urban center.

Various Contamination Contributors

The situation in the city is attributed to a mix of various sources including heavy vehicle emissions, airborne particles, building projects, garbage fires and pollutants from crop residue ignition in adjacent areas of farming communities.

Within these states, farmers regularly ignite agricultural waste to clear them quickly, producing hazardous smog that remains stagnant over the city as winter air descends.

Medical and Economic Impact

The economic and health consequences on the approximately 33 million inhabitants residing in the capital region is significant, according to multiple research.

The contaminated air causes elevated rates of nervous system, cardiovascular and respiratory disorders, and can even lead to cancer.

Air quality crisis is calculated to be responsible for approximately 10k untimely deaths annually in the capital.