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As Tuesday dawned citizens of the world's most polluted city found themselves inhaling dangerously toxic air that registered in the "severe" category.

Extremely High Air Quality Measurements

Various sections of the city recorded an air quality index above 500, which equals a tenfold increase over the healthy level established by the World Health Organization.

Particular areas, concentrations of dangerous airborne particles soared to of 1800, equating to 15 to 20 times exceeding acceptable standards.

Pyrotechnics Restrictions and Recent Developments

Since 2020, officials had maintained a complete ban on the purchase and ignition of firecrackers during the Festival of Lights due to their substantial impact to the hazardous haze that engulfs the city as winter begins.

Yet earlier this year, the recently formed regional government petitioned the highest court to propose a easing of the restrictions.

They proposed allowing "green crackers" – which have been questioned by environmental experts as being only roughly 30 percent less polluting – as a middle ground between "heritage and public health".

Judicial Verdict and Implementation

Much to the frustration of medical and ecological campaigners, judges agreed to the request, stipulating that green firecrackers could be set off during limited periods throughout the festival.

Throughout the festival evening, there was considerable flouting of the designated hours across the metropolis, with minimal monitoring regarding whether the fireworks being used were actually the supposedly greener variety.

Many recording stations throughout the capital showed pollution peaking around midnight to some of the worst measurements seen during celebrations in at least the past three years.

Regional Consequences

The widespread use of firecrackers during Diwali also initiated a dispute with adjacent Pakistan, with representatives in Pakistan's Punjab partly blaming declining pollution levels in Lahore on hazardous particles traveling from neighboring India following the festivities.

Long-Standing Pollution Crisis

Alarmingly severe readings of pollution in the city have continued as a significant issue for fifteen-plus years, with the condition continuing to worsen.

Around Diwali, the amount of toxic particulate matter in the atmosphere has been found to spike to 70% higher the worst records ever measured in China's capital, which was formerly regarded as the globally most contaminated city.

Various Contamination Factors

The problem in the capital is caused by a mix of various sources including automobile exhaust, construction debris, construction activities, garbage fires and pollutants from farm burning in adjacent regions of Punjab and Haryana.

Throughout these areas, rural residents illegally burn crop residue to clear them quickly, generating hazardous pollution that then gets trapped over the city as winter air sets in.

Public Health and Financial Impact

Both financial and medical impact on the roughly thirty-three million inhabitants calling home the capital region is substantial, according to various studies.

These hazardous conditions results in increased incidence of nervous system, heart and circulatory and breathing disorders, and can even lead to oncological diseases.

Air quality crisis is estimated to be causing approximately 10k premature mortalities per year in Delhi.