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As Tuesday dawned residents of the world's most polluted city found themselves breathing extremely polluted air that was classified as the "severe" level.

Extremely High Air Quality Measurements

Multiple areas of the capital registered an air quality index exceeding 500, which equals ten times the recommended threshold established by the global health authority.

Particular areas, levels of toxic particulate matter soared to of 1,800, equating to 15 to 20 times higher than acceptable standards.

Fireworks Ban and Recent Developments

Since 2020, authorities had maintained a comprehensive restriction on the sale and use of firecrackers during Diwali due to their major role to the dangerous haze that engulfs the metropolis as winter sets in.

Nevertheless in recent months, the recently formed city government approached the highest court to seek a easing of the restrictions.

They proposed allowing "eco-friendly fireworks" – historically criticized by environmentalists as being only about 30% less polluting – as a balance between "heritage and public health".

Court Decision and Reality

To the disappointment of medical and ecological activists, judicial authorities approved the appeal, specifying that environmentally conscious fireworks could be used during designated periods throughout the Diwali.

On Monday night, there was widespread disregard of the time restrictions across the city, with insufficient regulation regarding whether the fireworks being used were actually the eco-friendly version.

Many air quality sensors throughout Delhi showed air quality spiking around late evening to some of the worst readings observed during the festival in at least three years.

International Consequences

The widespread use of fireworks during the celebrations also triggered a dispute with bordering Pakistan, with authorities in Pakistan's Punjab partially attributing deteriorating atmospheric conditions in the city of Lahore on contaminants coming from neighboring India following the events.

Chronic Environmental Crisis

Alarmingly severe concentrations of air contamination in the capital have remained as a serious challenge for fifteen-plus years, with the problem showing no improvement.

Near the festival period, the amount of hazardous airborne contaminants in the air has been observed to spike to significantly exceeding the peak levels ever documented in the Chinese city, which was previously regarded as the world's most polluted urban center.

Multiple Contamination Sources

The situation in the capital is caused by a combination of multiple factors including transportation pollution, dust, construction activities, garbage fires and haze from crop residue ignition in neighbouring states of neighboring agricultural zones.

In these regions, rural residents illegally set their fields on fire to clear them quickly, producing dangerous smog that remains stagnant over the city as winter air descends.

Public Health and Economic Consequences

Public health and economic consequences on the nearly 33 million inhabitants living in the Delhi area is enormous, according to numerous investigations.

This pollution causes elevated rates of nervous system, cardiovascular and respiratory conditions, and can result in cancer.

The pollution is estimated to be responsible for approximately 10k early deaths per year in the capital.