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As Tuesday dawned residents of the planet's dirtiest urban center encountered breathing extremely polluted air that was classified as the "severe" category.

Alarming Air Quality Levels

Several parts of the capital registered an air quality index over 500, which represents a tenfold increase over the recommended threshold recommended by the WHO.

Certain monitoring stations, concentrations of dangerous airborne particles hit highs of 1800, amounting to 15-20x exceeding healthy levels.

Fireworks Restrictions and New Policy Shifts

Beginning in 2020, authorities had maintained a total prohibition on the sale and use of firecrackers during Diwali due to their significant contribution to the hazardous haze that blankets the metropolis as the cold season sets in.

Nevertheless recently, the current local leadership appealed to the highest court to seek a easing of the restrictions.

The suggestion was allowing "environmentally conscious pyrotechnics" – which have been doubted by conservation groups as being only about 30% reduced emissions – as a compromise between "tradition and environment".

Legal Verdict and Reality

To the disappointment of public health and environmental advocates, judges approved the proposal, specifying that eco-friendly pyrotechnics could be set off during specific time windows throughout the Diwali.

During the celebrations, there was widespread flouting of the designated hours across the metropolis, with minimal monitoring regarding whether the pyrotechnics being used were actually the more environmentally friendly variety.

Many air quality sensors throughout Delhi recorded pollution reaching highest levels around midnight to some of the worst readings recorded during celebrations in at least three years.

Regional Implications

The proliferation of firecrackers during the festival also sparked a controversy with adjacent Pakistan, with officials in Pakistan's the Punjab region partly blaming declining air quality in Lahore on contaminants traveling from India following the events.

Long-Standing Pollution Crisis

The dangerously high readings of pollution in Delhi have continued as a serious challenge for fifteen-plus years, with the situation gradually deteriorating.

Near Diwali, the amount of hazardous particles in the air has been found to spike to 70% higher the peak readings ever recorded in Beijing, which was formerly considered as the world's most polluted metropolis.

Multiple Pollution Factors

This crisis in the capital is resulting from a mix of multiple factors including heavy vehicle emissions, airborne particles, construction activities, garbage fires and haze from farm burning in neighbouring regions of Punjab and Haryana.

In these regions, farmers illegally ignite agricultural waste to prepare for next season, producing toxic pollution that remains stagnant over the capital as winter air arrives.

Health and Financial Impact

Both financial and medical impact on the approximately 33 million residents calling home the Delhi area is enormous, according to numerous research.

These hazardous conditions causes high levels of neurological, cardiovascular and lung disorders, and can result in cancer.

Environmental contamination is calculated to be accounting for 10,000 untimely deaths annually in the capital.