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As Tuesday dawned residents of the planet's dirtiest urban center encountered breathing dangerously toxic air that fell into the "alarming" level.

Record-Breaking Pollution Measurements

Multiple areas of the capital registered an pollution measurement above 500, which translates to 10x the safe level recommended by the World Health Organization.

In some locations, readings of toxic particulate matter soared to of 1,800, representing 15-20x higher than safe limits.

Firecracker Prohibition and Recent Policy Shifts

For the past four years, officials had maintained a total prohibition on the distribution and bursting of fireworks during the Festival of Lights due to their major role to the dangerous haze that blankets the metropolis as the cold season begins.

Nevertheless recently, the newly elected city leadership appealed to the highest court to request a easing of the restrictions.

They proposed allowing "green crackers" – which have been criticized by environmentalists as being only about 30% reduced emissions – as a middle ground between "cultural practices and public health".

Legal Decision and Implementation

To the disappointment of public health and environmental campaigners, the court complied with the proposal, specifying that environmentally conscious fireworks could be used during limited periods throughout the Diwali.

During the celebrations, there was extensive disregard of the regulated periods across the metropolis, with minimal monitoring regarding whether the fireworks being used were actually the eco-friendly version.

Several recording stations throughout the city registered air quality reaching highest levels around the night hours to the most severe readings observed during the festival in at least recent memory.

Regional Consequences

The proliferation of fireworks during the festival also sparked a blame game with neighbouring the neighboring country, with authorities in Pakistani Punjab pointing to declining pollution levels in their urban centers on hazardous particles coming from neighboring India following the events.

Long-Standing Environmental Issue

Alarmingly severe readings of pollution in the capital have remained as a significant challenge for fifteen-plus years, with the situation continuing to worsen.

Near celebratory seasons, the amount of hazardous particulate matter in the environment has been documented to shoot up to significantly exceeding the peak readings ever measured in the Chinese city, which was previously regarded as the globally most contaminated city.

Diverse Contamination Contributors

The problem in Delhi is attributed to a mix of different contributors including heavy vehicle emissions, construction debris, development work, garbage fires and smoke from crop residue ignition in nearby regions of farming communities.

In these regions, agricultural workers routinely ignite agricultural waste to prepare for next season, creating toxic smog that then gets trapped over the metropolitan area as winter air sets in.

Health and Economic Impact

The economic and health consequences on the roughly thirty-three million residents calling home the capital region is significant, according to multiple studies.

This pollution causes elevated rates of nervous system, cardiovascular and respiratory conditions, and can result in malignancies.

Environmental contamination is projected to be accounting for approximately 10k early deaths each year in the city.