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Tuesday brought residents of the planet's dirtiest urban center were faced with breathing dangerously toxic air that fell into the "alarming" category.

Alarming Pollution Measurements

Multiple areas of the city showed an air quality index over 500, which represents 10x the safe threshold recommended by the WHO.

In some locations, concentrations of toxic particulate matter reached peaks of eighteen hundred, representing 15-20x above acceptable standards.

Firecracker Ban and Current Policy Shifts

Since 2020, authorities had maintained a comprehensive restriction on the sale and use of firecrackers during Diwali due to their significant contribution to the hazardous pollution that covers the capital as winter approaches.

However in recent months, the current regional administration approached the highest court to seek a relaxation of the ban.

Officials advocated for allowing "eco-friendly fireworks" – which have been criticized by environmental experts as being only approximately one-third reduced emissions – as a balance between "heritage and environment".

Legal Verdict and Implementation

Much to the frustration of environmental and health campaigners, judges approved the request, specifying that green firecrackers could be used during specific hours throughout the Diwali.

Throughout the festival evening, there was widespread flouting of the time restrictions across the capital, with insufficient enforcement regarding whether the fireworks being used were actually the supposedly greener variety.

Several recording stations throughout Delhi showed pollution spiking around late evening to some of the worst levels recorded during Diwali in at least the past three years.

Cross-Border Effects

Extensive ignition of fireworks during Diwali also sparked a blame game with adjacent the neighboring country, with officials in Pakistani Punjab province partially attributing deteriorating atmospheric conditions in Lahore on hazardous particles traveling from India following the festivities.

Chronic Environmental Crisis

Extremely elevated levels of air contamination in the city have persisted as a serious issue for over a decade and a half, with the situation gradually deteriorating.

During Diwali, the concentration of dangerous airborne contaminants in the air has been documented to shoot up to 70% higher the most severe records ever recorded in China's capital, which was once considered as the planet's dirtiest urban center.

Various Contamination Sources

This crisis in Delhi is caused by a mix of various sources including transportation pollution, construction debris, construction activities, rubbish burning and haze from crop residue ignition in nearby regions of farming communities.

In these regions, agricultural workers routinely burn crop residue to expedite field preparation, producing dangerous haze that then gets trapped over the capital as colder air descends.

Health and Economic Consequences

Public health and economic impact on the nearly 33 million inhabitants residing in the Delhi area is significant, according to numerous investigations.

These hazardous conditions causes increased incidence of nervous system, heart and circulatory and breathing disorders, and can result in malignancies.

Environmental contamination is projected to be accounting for approximately 10k premature fatalities each year in the capital.