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Tuesday brought inhabitants of the world's most polluted city found themselves inhaling severely hazardous air that registered in the "severe" range.

Extremely High Pollution Levels

Various sections of Delhi showed an air quality index exceeding 500, which translates to ten times the healthy limit established by the World Health Organization.

In some locations, concentrations of toxic particulate matter soared to of eighteen hundred, equating to 15-20x exceeding healthy levels.

Fireworks Prohibition and Current Changes

Since 2020, officials had maintained a complete ban on the purchase and ignition of pyrotechnics during Diwali due to their significant contribution to the dangerous pollution that covers the capital as colder weather sets in.

However recently, the recently formed local leadership approached the judicial authority to propose a modification of the restrictions.

The suggestion was allowing "environmentally conscious pyrotechnics" – historically questioned by environmental experts as being only about 30% lower impact – as a middle ground between "cultural practices and public health".

Legal Verdict and Implementation

To the disappointment of environmental and health activists, judicial authorities approved the request, stipulating that green firecrackers could be ignited during designated hours throughout the celebrations.

During the celebrations, there was extensive disregard of the regulated periods across the city, with insufficient regulation regarding whether the pyrotechnics being used were actually the supposedly greener variety.

Many air quality sensors throughout Delhi registered contamination peaking around late evening to extremely hazardous levels observed during Diwali in at least three years.

Cross-Border Consequences

The proliferation of firecrackers during the festival also initiated a controversy with adjacent Pakistan, with officials in Pakistani Punjab pointing to worsening air quality in their urban centers on pollutants originating in across the border following the festivities.

Long-Standing Pollution Issue

The dangerously high levels of atmospheric toxins in the capital have remained as a serious issue for fifteen-plus years, with the condition showing no improvement.

During Diwali, the levels of toxic particles in the air has been observed to spike to 70% higher the most severe records ever measured in the Chinese city, which was once viewed as the globally most contaminated urban center.

Diverse Contamination Factors

The situation in the capital is resulting from a mix of different contributors including transportation pollution, dust, development work, garbage fires and smoke from farm burning in neighbouring areas of neighboring agricultural zones.

Within these states, rural residents regularly ignite agricultural waste to expedite field preparation, creating hazardous smog that then gets trapped over the city as colder air sets in.

Medical and Economic Consequences

The economic and health toll on the nearly 33 million residents residing in the Delhi area is significant, according to numerous investigations.

These hazardous conditions leads to increased incidence of neurological, heart and circulatory and breathing diseases, and can result in malignancies.

Environmental contamination is calculated to be accounting for ten thousand untimely mortalities each year in Delhi.