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Tuesday brought citizens of the world's most polluted city found themselves breathing extremely polluted air that was classified as the "alarming" range.

Alarming Air Quality Levels

Several parts of the city registered an AQI exceeding 500, which translates to ten times the healthy threshold recommended by the WHO.

In some locations, readings of toxic particulate matter reached peaks of eighteen hundred, amounting to 15 to 20 times exceeding acceptable levels.

Fireworks Restrictions and Recent Changes

Since 2020, the government had implemented a complete ban on the distribution and bursting of firecrackers during the Festival of Lights due to their substantial impact to the dangerous haze that covers the capital as colder weather sets in.

Yet recently, the newly elected regional government petitioned the supreme court to request a modification of the restrictions.

Officials advocated for allowing "environmentally conscious pyrotechnics" – historically questioned by environmentalists as being only about 30% less polluting – as a balance between "cultural practices and ecological concerns".

Court Decision and Implementation

To the disappointment of public health and environmental advocates, judicial authorities agreed to the proposal, mandating that environmentally conscious fireworks could be set off during designated periods throughout the Diwali.

On Monday night, there was considerable disregard of the regulated periods across the city, with little enforcement regarding whether the firecrackers being used were actually the eco-friendly variety.

Several air quality sensors throughout the city showed air quality spiking around midnight to the most severe levels recorded during the festival in at least the past three years.

Cross-Border Implications

The widespread use of fireworks during the celebrations also triggered a dispute with bordering the neighboring country, with authorities in Pakistani Punjab partially attributing declining pollution levels in the city of Lahore on contaminants coming from India following the events.

Long-Standing Environmental Crisis

Alarmingly severe concentrations of pollution in the city have remained as a significant problem for fifteen-plus years, with the problem continuing to worsen.

During celebratory seasons, the amount of hazardous particles in the atmosphere has been documented to spike to 70% higher the most severe records ever documented in the Chinese city, which was formerly viewed as the planet's dirtiest city.

Multiple Pollution Factors

This crisis in the city is resulting from a combination of multiple factors including heavy vehicle emissions, airborne particles, building projects, waste incineration and smoke from crop residue ignition in adjacent areas of Punjab and Haryana.

Within these states, rural residents illegally burn crop residue to expedite field preparation, creating toxic pollution that remains stagnant over the metropolitan area as winter air descends.

Medical and Financial Consequences

The economic and health impact on the nearly 33 million people residing in the Delhi area is enormous, according to multiple research.

This pollution leads to high levels of neurological, heart and circulatory and respiratory diseases, and can result in cancer.

Air quality crisis is estimated to be accounting for ten thousand premature fatalities annually in the city.