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On Tuesday morning residents of the planet's dirtiest urban center were faced with exposed to dangerously toxic air that registered in the "alarming" category.

Record-Breaking Air Quality Readings

Several parts of Delhi registered an AQI over 500, which translates to ten times the safe limit established by the WHO.

Certain monitoring stations, readings of PM2.5 and PM10 hit highs of 1,800, amounting to 15 to 20 times exceeding acceptable levels.

Fireworks Ban and Recent Changes

Since 2020, officials had enforced a total prohibition on the purchase and ignition of firecrackers during the Festival of Lights due to their major role to the deadly pollution that covers the metropolis as colder weather sets in.

However in recent months, the newly elected city leadership approached the highest court to request a modification of the ban.

Officials advocated for allowing "green crackers" – historically criticized by environmental experts as being only about 30% less polluting – as a balance between "heritage and public health".

Judicial Ruling and Implementation

To the disappointment of medical and ecological advocates, judges agreed to the proposal, specifying that green firecrackers could be used during limited hours throughout the festival.

On Monday night, there was considerable violation of the designated hours across the city, with little regulation regarding whether the pyrotechnics being used were actually the more environmentally friendly version.

Several monitoring devices throughout the city showed air quality peaking around midnight to some of the worst readings seen during the festival in at least the past three years.

Cross-Border Consequences

The proliferation of firecrackers during the festival also sparked a controversy with adjacent Pakistan, with authorities in Pakistani Punjab province partly blaming deteriorating atmospheric conditions in the city of Lahore on contaminants coming from across the border following the events.

Long-Standing Environmental Issue

Extremely elevated concentrations of atmospheric toxins in the city have persisted as a significant issue for over a decade and a half, with the problem gradually deteriorating.

Near the festival period, the levels of dangerous particulate matter in the air has been documented to increase dramatically to significantly exceeding the most severe levels ever recorded in China's capital, which was previously viewed as the globally most contaminated metropolis.

Various Contamination Contributors

This crisis in the city is resulting from a combination of various sources including transportation pollution, dust, construction activities, rubbish burning and pollutants from farm burning in neighbouring regions of Punjab and Haryana.

Within these states, rural residents illegally burn crop residue to prepare for next season, creating toxic smog that then gets trapped over the capital as winter air descends.

Public Health and Financial Impact

Public health and economic impact on the roughly thirty-three million inhabitants calling home the metropolitan zone is enormous, according to multiple studies.

This pollution leads to elevated rates of neurological, heart and circulatory and breathing disorders, and can potentially cause malignancies.

Environmental contamination is projected to be accounting for ten thousand untimely fatalities each year in the city.