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Tuesday brought citizens of the world's most polluted city were faced with breathing dangerously toxic air that fell into the "severe" category.

Alarming Air Quality Measurements

Multiple areas of the capital recorded an AQI above 500, which equals ten times the safe level recommended by the global health authority.

In some locations, readings of PM2.5 and PM10 reached peaks of eighteen hundred, amounting to fifteen to twenty times exceeding healthy limits.

Pyrotechnics Prohibition and Current Policy Shifts

Beginning in 2020, the government had maintained a comprehensive restriction on the purchase and ignition of fireworks during the Festival of Lights due to their major role to the deadly pollution that covers the city as the cold season begins.

Nevertheless earlier this year, the newly elected city government appealed to the supreme court to propose a relaxation of the ban.

Officials advocated for allowing "eco-friendly fireworks" – previously questioned by conservation groups as being only about 30% lower impact – as a middle ground between "cultural practices and environment".

Court Ruling and Implementation

Despite concerns of environmental and health advocates, judges agreed to the appeal, stipulating that eco-friendly pyrotechnics could be used during limited hours throughout the celebrations.

On Monday night, there was extensive violation of the regulated periods across the city, with insufficient enforcement regarding whether the fireworks being used were actually the eco-friendly version.

Numerous monitoring devices throughout the capital showed pollution peaking around late evening to extremely hazardous measurements seen during the festival in at least recent memory.

International Consequences

The widespread use of fireworks during the festival also sparked a blame game with bordering Pakistan, with representatives in Pakistan's Punjab partly blaming deteriorating atmospheric conditions in their urban centers on contaminants coming from India following the events.

Persistent Environmental Crisis

Extremely elevated readings of air contamination in the city have remained as a serious issue for more than 15 years, with the problem gradually deteriorating.

During Diwali, the levels of dangerous airborne contaminants in the air has been observed to increase dramatically to 70% higher the peak levels ever documented in the Chinese city, which was formerly viewed as the globally most contaminated urban center.

Multiple Contamination Factors

The problem in Delhi is resulting from a convergence of multiple factors including automobile exhaust, construction debris, building projects, waste incineration and haze from agricultural fires in adjacent regions of neighboring agricultural zones.

In these regions, agricultural workers regularly set their fields on fire to expedite field preparation, creating dangerous pollution that then gets trapped over the city as cooler air arrives.

Medical and Economic Consequences

The economic and health consequences on the roughly thirty-three million people calling home the metropolitan zone is significant, according to various investigations.

This pollution leads to high levels of nervous system, cardiovascular and respiratory diseases, and can even lead to malignancies.

The pollution is estimated to be causing 10,000 premature mortalities per year in the capital.