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As Tuesday dawned residents of the planet's dirtiest urban center encountered breathing dangerously toxic air that registered in the "critical" category.

Record-Breaking Pollution Levels

Multiple areas of the capital showed an air quality index exceeding 500, which translates to 10x the healthy level established by the WHO.

Certain monitoring stations, levels of toxic particulate matter reached peaks of 1800, representing 15-20x exceeding healthy levels.

Pyrotechnics Ban and Recent Changes

Beginning in 2020, authorities had maintained a comprehensive restriction on the sale and use of fireworks during Diwali due to their significant contribution to the deadly pollution that covers the capital as the cold season begins.

Yet recently, the newly elected city government appealed to the supreme court to seek a modification of the prohibition.

Officials advocated for allowing "environmentally conscious pyrotechnics" – previously criticized by environmentalists as being only about 30% lower impact – as a compromise between "tradition and public health".

Legal Decision and Reality

Much to the frustration of medical and ecological activists, judicial authorities agreed to the proposal, mandating that eco-friendly pyrotechnics could be set off during specific periods throughout the Diwali.

On Monday night, there was extensive flouting of the time restrictions across the metropolis, with little enforcement regarding whether the firecrackers being used were actually the more environmentally friendly type.

Numerous air quality sensors throughout the city registered air quality spiking around midnight to extremely hazardous readings recorded during Diwali in at least three years.

Cross-Border Effects

Extensive ignition of pyrotechnics during the celebrations also initiated a blame game with neighbouring the neighboring country, with representatives in Pakistani Punjab partially attributing deteriorating atmospheric conditions in their urban centers on contaminants traveling from across the border following the festivities.

Persistent Environmental Issue

The dangerously high levels of pollution in the city have remained as a serious problem for fifteen-plus years, with the situation gradually deteriorating.

Near the festival period, the amount of toxic particles in the air has been documented to shoot up to 70% higher the peak levels ever measured in China's capital, which was formerly considered as the globally most contaminated urban center.

Multiple Pollution Sources

The situation in Delhi is resulting from a mix of different contributors including heavy vehicle emissions, construction debris, construction activities, garbage fires and smoke from agricultural fires in neighbouring areas of neighboring agricultural zones.

Within these states, farmers routinely ignite agricultural waste to prepare for next season, creating toxic pollution that then gets trapped over the metropolitan area as colder air descends.

Public Health and Economic Consequences

Public health and economic impact on the roughly thirty-three million inhabitants residing in the metropolitan zone is substantial, according to numerous studies.

The contaminated air results in increased incidence of nervous system, heart and circulatory and breathing diseases, and can potentially cause oncological diseases.

Air quality crisis is estimated to be responsible for 10,000 premature fatalities each year in the city.