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Tuesday brought citizens of the world's most polluted city were faced with inhaling extremely polluted air that registered in the "critical" range.

Alarming Air Quality Measurements

Several parts of the capital recorded an air quality index exceeding 500, which translates to a tenfold increase over the recommended level set by the World Health Organization.

Particular areas, levels of toxic particulate matter hit highs of 1800, amounting to 15-20x higher than acceptable levels.

Firecracker Prohibition and New Policy Shifts

For the past four years, officials had enforced a comprehensive restriction on the sale and use of firecrackers during the Festival of Lights due to their significant contribution to the hazardous haze that blankets the capital as the cold season approaches.

Nevertheless recently, the recently formed city leadership appealed to the judicial authority to request a relaxation of the ban.

They proposed allowing "eco-friendly fireworks" – previously questioned by environmental experts as being only about 30% less polluting – as a balance between "tradition and public health".

Judicial Ruling and Enforcement

To the disappointment of medical and ecological advocates, the court complied with the request, specifying that green firecrackers could be set off during designated hours throughout the celebrations.

During the celebrations, there was widespread disregard of the regulated periods across the capital, with insufficient monitoring regarding whether the fireworks being used were actually the supposedly greener type.

Many recording stations throughout Delhi recorded contamination spiking around midnight to the most severe measurements observed during Diwali in at least recent memory.

International Consequences

Extensive ignition of firecrackers during Diwali also initiated a dispute with bordering the neighboring country, with officials in Pakistani the Punjab region partly blaming declining air quality in Lahore on pollutants traveling from across the border following the celebrations.

Long-Standing Environmental Issue

Alarmingly severe readings of air contamination in the city have persisted as a serious challenge for fifteen-plus years, with the problem gradually deteriorating.

Around celebratory seasons, the levels of hazardous particulate matter in the atmosphere has been observed to increase dramatically to 70% higher the worst levels ever measured in China's capital, which was previously viewed as the world's most polluted urban center.

Multiple Pollution Factors

This crisis in the capital is attributed to a convergence of multiple factors including automobile exhaust, construction debris, construction activities, rubbish burning and smoke from farm burning in adjacent states of neighboring agricultural zones.

Throughout these areas, rural residents routinely burn crop residue to clear them quickly, creating toxic haze that then gets trapped over the city as colder air descends.

Health and Financial Impact

The economic and health impact on the approximately 33 million people living in the metropolitan zone is significant, according to multiple studies.

The contaminated air results in high levels of neurological, cardiovascular and respiratory diseases, and can even lead to malignancies.

Environmental contamination is projected to be causing ten thousand untimely fatalities annually in the city.