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As Tuesday dawned citizens of the planet's dirtiest urban center found themselves exposed to extremely polluted air that registered in the "critical" range.

Record-Breaking Pollution Levels

Various sections of Delhi registered an AQI exceeding 500, which translates to ten times the safe threshold recommended by the global health authority.

Particular areas, readings of PM2.5 and PM10 hit highs of 1800, representing 15-20x exceeding safe levels.

Fireworks Prohibition and Recent Developments

Since 2020, the government had implemented a comprehensive restriction on the purchase and ignition of firecrackers during celebrations due to their substantial impact to the hazardous pollution that blankets the city as colder weather sets in.

Yet in recent months, the newly elected local government appealed to the highest court to request a relaxation of the prohibition.

Officials advocated for allowing "green crackers" – which have been doubted by environmental experts as being only roughly 30 percent reduced emissions – as a compromise between "cultural practices and environment".

Legal Verdict and Implementation

Despite concerns of public health and environmental campaigners, the court complied with the request, stipulating that green firecrackers could be set off during designated time windows throughout the festival.

On Monday night, there was widespread disregard of the time restrictions across the capital, with little regulation regarding whether the fireworks being used were actually the supposedly greener version.

Many monitoring devices throughout Delhi showed air quality reaching highest levels around late evening to extremely hazardous measurements recorded during Diwali in at least the past three years.

International Consequences

The proliferation of pyrotechnics during the celebrations also triggered a controversy with bordering Pakistan, with officials in Pakistani Punjab province partially attributing deteriorating pollution levels in their urban centers on contaminants coming from neighboring India following the festivities.

Chronic Pollution Problem

Extremely elevated concentrations of atmospheric toxins in the capital have continued as a serious problem for fifteen-plus years, with the problem gradually deteriorating.

Near celebratory seasons, the levels of dangerous airborne contaminants in the atmosphere has been documented to increase dramatically to significantly exceeding the most severe records ever measured in China's capital, which was previously viewed as the planet's dirtiest city.

Multiple Contamination Contributors

This crisis in the city is caused by a combination of different contributors including automobile exhaust, dust, building projects, rubbish burning and smoke from crop residue ignition in neighbouring areas of Punjab and Haryana.

Throughout these areas, rural residents illegally set their fields on fire to clear them quickly, creating dangerous haze that then gets trapped over the capital as cooler air descends.

Public Health and Economic Consequences

Both financial and medical toll on the nearly 33 million people calling home the Delhi area is significant, according to numerous investigations.

The contaminated air causes increased incidence of nervous system, cardiovascular and respiratory disorders, and can result in cancer.

Environmental contamination is projected to be responsible for ten thousand untimely deaths annually in the capital.