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As Tuesday dawned inhabitants of this heavily contaminated metropolis found themselves exposed to dangerously toxic air that registered in the "critical" level.

Record-Breaking Air Quality Levels

Several parts of the city registered an air quality index above 500, which equals ten times the safe level recommended by the World Health Organization.

Certain monitoring stations, readings of dangerous airborne particles hit highs of 1800, representing 15 to 20 times higher than healthy levels.

Firecracker Prohibition and Current Policy Shifts

Beginning in 2020, officials had enforced a comprehensive restriction on the distribution and bursting of fireworks during the Festival of Lights due to their major role to the deadly haze that blankets the capital as winter approaches.

Nevertheless recently, the newly elected local government petitioned the highest court to propose a relaxation of the prohibition.

They proposed allowing "environmentally conscious pyrotechnics" – which have been criticized by conservation groups as being only about 30% less polluting – as a middle ground between "cultural practices and public health".

Judicial Decision and Reality

Despite concerns of environmental and health campaigners, the court approved the appeal, stipulating that eco-friendly pyrotechnics could be set off during specific time windows throughout the festival.

During the celebrations, there was considerable flouting of the designated hours across the capital, with insufficient enforcement regarding whether the pyrotechnics being used were actually the supposedly greener version.

Several monitoring devices throughout the city recorded contamination spiking around the night hours to the most severe levels recorded during the festival in at least three years.

Regional Implications

Extensive ignition of firecrackers during Diwali also triggered a dispute with neighbouring Pakistan, with representatives in Pakistani Punjab province partly blaming deteriorating atmospheric conditions in the city of Lahore on hazardous particles coming from India following the celebrations.

Chronic Pollution Problem

Extremely elevated readings of pollution in the city have persisted as a significant issue for more than 15 years, with the problem continuing to worsen.

During the festival period, the levels of dangerous particles in the atmosphere has been documented to increase dramatically to seventy percent above the most severe records ever recorded in the Chinese city, which was formerly considered as the globally most contaminated metropolis.

Diverse Contamination Sources

The situation in the city is resulting from a combination of multiple factors including heavy vehicle emissions, construction debris, construction activities, garbage fires and haze from farm burning in neighbouring states of farming communities.

In these regions, rural residents illegally burn crop residue to expedite field preparation, generating hazardous haze that remains stagnant over the metropolitan area as winter air sets in.

Public Health and Financial Consequences

The economic and health toll on the approximately 33 million inhabitants calling home the capital region is substantial, according to various investigations.

The contaminated air results in elevated rates of neurological, cardiovascular and respiratory conditions, and can potentially cause cancer.

Environmental contamination is calculated to be causing approximately 10k untimely deaths annually in the capital.