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Tuesday brought residents of this heavily contaminated metropolis found themselves breathing dangerously toxic air that was classified as the "severe" category.

Alarming Pollution Measurements

Various sections of the capital showed an pollution measurement exceeding 500, which translates to ten times the healthy level set by the World Health Organization.

Particular areas, levels of PM2.5 and PM10 reached peaks of eighteen hundred, equating to 15 to 20 times exceeding safe limits.

Pyrotechnics Restrictions and Recent Changes

For the past four years, authorities had maintained a total prohibition on the sale and use of firecrackers during Diwali due to their significant contribution to the hazardous smog that blankets the capital as colder weather sets in.

Nevertheless earlier this year, the current regional leadership appealed to the supreme court to seek a relaxation of the prohibition.

They proposed allowing "eco-friendly fireworks" – previously doubted by environmental experts as being only about 30% reduced emissions – as a middle ground between "heritage and environment".

Court Ruling and Implementation

Much to the frustration of environmental and health advocates, judicial authorities agreed to the request, stipulating that green firecrackers could be ignited during designated time windows throughout the Diwali.

Throughout the festival evening, there was extensive disregard of the designated hours across the city, with little regulation regarding whether the pyrotechnics being used were actually the supposedly greener version.

Numerous recording stations throughout Delhi recorded pollution reaching highest levels around midnight to some of the worst readings recorded during Diwali in at least three years.

International Effects

The widespread use of firecrackers during the festival also sparked a blame game with bordering the neighboring country, with officials in Pakistani the Punjab region partially attributing deteriorating air quality in their urban centers on contaminants originating in neighboring India following the festivities.

Persistent Environmental Crisis

The dangerously high levels of air contamination in Delhi have continued as a major challenge for fifteen-plus years, with the situation showing no improvement.

Around the festival period, the concentration of toxic particles in the air has been found to increase dramatically to seventy percent above the most severe levels ever recorded in the Chinese city, which was previously regarded as the planet's dirtiest urban center.

Diverse Pollution Sources

The situation in the capital is resulting from a mix of multiple factors including heavy vehicle emissions, dust, building projects, garbage fires and pollutants from agricultural fires in neighbouring regions of neighboring agricultural zones.

Within these states, farmers illegally burn crop residue to expedite field preparation, generating toxic smog that remains stagnant over the capital as cooler air sets in.

Health and Financial Toll

Public health and economic toll on the approximately 33 million inhabitants residing in the capital region is significant, according to numerous research.

The contaminated air causes high levels of nervous system, heart and circulatory and respiratory conditions, and can result in cancer.

Environmental contamination is calculated to be responsible for ten thousand premature deaths annually in the city.