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On Tuesday morning citizens of the world's most polluted city were faced with breathing extremely polluted air that registered in the "severe" range.

Extremely High Pollution Measurements

Multiple areas of Delhi registered an AQI exceeding 500, which represents ten times the safe threshold recommended by the WHO.

Particular areas, concentrations of toxic particulate matter hit highs of eighteen hundred, equating to 15-20x above healthy limits.

Pyrotechnics Restrictions and Current Policy Shifts

Since 2020, the government had maintained a comprehensive restriction on the purchase and ignition of fireworks during Diwali due to their significant contribution to the deadly smog that blankets the capital as the cold season begins.

However earlier this year, the newly elected local administration appealed to the highest court to seek a easing of the ban.

They proposed allowing "green crackers" – historically questioned by environmental experts as being only roughly 30 percent lower impact – as a balance between "heritage and public health".

Legal Verdict and Implementation

Despite concerns of public health and environmental campaigners, judicial authorities complied with the appeal, specifying that eco-friendly pyrotechnics could be set off during specific hours throughout the celebrations.

On Monday night, there was considerable violation of the designated hours across the capital, with insufficient enforcement regarding whether the firecrackers being used were actually the eco-friendly variety.

Many air quality sensors throughout the city recorded pollution peaking around midnight to the most severe readings seen during celebrations in at least recent memory.

Cross-Border Effects

The widespread use of firecrackers during Diwali also sparked a blame game with neighbouring the neighboring country, with authorities in Pakistan's the Punjab region partially attributing deteriorating atmospheric conditions in their urban centers on pollutants coming from India following the celebrations.

Persistent Pollution Issue

Extremely elevated levels of air contamination in the city have persisted as a significant challenge for fifteen-plus years, with the problem gradually deteriorating.

During the festival period, the amount of toxic particles in the atmosphere has been found to shoot up to significantly exceeding the most severe records ever documented in Beijing, which was formerly viewed as the globally most contaminated metropolis.

Diverse Contamination Sources

This crisis in Delhi is caused by a mix of various sources including transportation pollution, airborne particles, construction activities, garbage fires and haze from agricultural fires in nearby areas of neighboring agricultural zones.

In these regions, farmers routinely burn crop residue to clear them quickly, producing hazardous pollution that becomes contained over the metropolitan area as colder air arrives.

Medical and Economic Impact

Both financial and medical toll on the roughly thirty-three million people living in the capital region is substantial, according to numerous studies.

These hazardous conditions results in increased incidence of neurological, cardiovascular and lung disorders, and can even lead to cancer.

Environmental contamination is estimated to be causing ten thousand premature fatalities annually in Delhi.