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Tuesday brought citizens of the world's most polluted city encountered breathing extremely polluted air that registered in the "severe" level.

Record-Breaking Air Quality Measurements

Several parts of Delhi recorded an pollution measurement above 500, which represents 10x the safe limit set by the World Health Organization.

Particular areas, levels of toxic particulate matter hit highs of eighteen hundred, representing fifteen to twenty times higher than acceptable limits.

Fireworks Restrictions and New Developments

Since 2020, the government had implemented a complete ban on the sale and use of firecrackers during Diwali due to their significant contribution to the dangerous haze that blankets the city as colder weather approaches.

Yet earlier this year, the recently formed local government petitioned the supreme court to propose a modification of the restrictions.

The suggestion was allowing "eco-friendly fireworks" – historically questioned by environmental experts as being only approximately one-third reduced emissions – as a balance between "tradition and environment".

Judicial Verdict and Reality

Much to the frustration of environmental and health activists, the court agreed to the appeal, specifying that environmentally conscious fireworks could be set off during limited hours throughout the festival.

During the celebrations, there was considerable violation of the designated hours across the city, with little enforcement regarding whether the fireworks being used were actually the supposedly greener variety.

Several air quality sensors throughout Delhi showed air quality reaching highest levels around late evening to extremely hazardous levels seen during Diwali in at least recent memory.

Cross-Border Consequences

The widespread use of fireworks during the festival also initiated a controversy with bordering Pakistan, with officials in Pakistani the Punjab region pointing to worsening pollution levels in their urban centers on contaminants coming from neighboring India following the events.

Chronic Environmental Issue

Extremely elevated levels of atmospheric toxins in the capital have remained as a serious issue for over a decade and a half, with the condition continuing to worsen.

Around the festival period, the concentration of toxic particulate matter in the atmosphere has been documented to spike to significantly exceeding the peak levels ever documented in the Chinese city, which was formerly viewed as the globally most contaminated urban center.

Multiple Pollution Factors

The situation in Delhi is attributed to a convergence of different contributors including transportation pollution, dust, building projects, garbage fires and haze from farm burning in adjacent states of farming communities.

Within these states, farmers routinely ignite agricultural waste to expedite field preparation, creating dangerous pollution that remains stagnant over the capital as winter air arrives.

Public Health and Financial Toll

Both financial and medical impact on the approximately 33 million residents living in the capital region is substantial, according to multiple studies.

These hazardous conditions results in increased incidence of neurological, heart and circulatory and breathing diseases, and can even lead to cancer.

Environmental contamination is calculated to be causing ten thousand untimely mortalities each year in the city.