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As Tuesday dawned residents of the planet's dirtiest urban center found themselves exposed to dangerously toxic air that registered in the "critical" level.

Alarming Air Quality Levels

Various sections of Delhi registered an pollution measurement above 500, which represents ten times the healthy limit established by the global health authority.

Certain monitoring stations, levels of dangerous airborne particles soared to of eighteen hundred, amounting to 15-20x above healthy levels.

Pyrotechnics Prohibition and Current Changes

Since 2020, the government had maintained a complete ban on the distribution and bursting of pyrotechnics during celebrations due to their significant contribution to the deadly haze that covers the capital as colder weather begins.

Yet earlier this year, the current city administration approached the judicial authority to propose a relaxation of the restrictions.

Officials advocated for allowing "green crackers" – which have been questioned by environmental experts as being only about 30% less polluting – as a balance between "heritage and ecological concerns".

Court Decision and Enforcement

Despite concerns of public health and environmental campaigners, the court approved the request, specifying that green firecrackers could be used during specific hours throughout the Diwali.

During the celebrations, there was considerable flouting of the regulated periods across the city, with insufficient enforcement regarding whether the firecrackers being used were actually the supposedly greener version.

Many air quality sensors throughout the capital showed pollution peaking around midnight to the most severe levels recorded during Diwali in at least three years.

Cross-Border Effects

The proliferation of pyrotechnics during the celebrations also initiated a blame game with neighbouring the neighboring country, with authorities in Pakistan's Punjab partially attributing worsening air quality in their urban centers on hazardous particles coming from across the border following the events.

Long-Standing Environmental Issue

Extremely elevated concentrations of atmospheric toxins in the capital have remained as a significant challenge for more than 15 years, with the situation showing no improvement.

Around the festival period, the levels of toxic particles in the air has been found to increase dramatically to seventy percent above the peak readings ever measured in the Chinese city, which was formerly viewed as the globally most contaminated urban center.

Diverse Pollution Contributors

The situation in the city is resulting from a mix of different contributors including heavy vehicle emissions, construction debris, construction activities, garbage fires and pollutants from agricultural fires in neighbouring states of Punjab and Haryana.

Throughout these areas, agricultural workers routinely burn crop residue to expedite field preparation, creating toxic pollution that becomes contained over the city as cooler air descends.

Health and Financial Impact

Both financial and medical impact on the nearly 33 million people calling home the metropolitan zone is substantial, according to various studies.

This pollution leads to elevated rates of nervous system, cardiovascular and breathing conditions, and can even lead to malignancies.

Environmental contamination is calculated to be responsible for approximately 10k premature deaths each year in the city.