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

Extremely High Air Quality Levels

Various sections of Delhi registered an pollution measurement over 500, which translates to ten times the recommended threshold established by the World Health Organization.

Particular areas, levels of PM2.5 and PM10 soared to of eighteen hundred, equating to 15-20x above healthy levels.

Fireworks Ban and Recent Policy Shifts

Since 2020, the government had implemented a comprehensive restriction on the distribution and bursting of fireworks during Diwali due to their major role to the dangerous smog that covers the metropolis as the cold season sets in.

However recently, the current city administration petitioned the highest court to propose a relaxation of the prohibition.

The suggestion was allowing "environmentally conscious pyrotechnics" – which have been doubted by environmentalists as being only roughly 30 percent lower impact – as a compromise between "cultural practices and environment".

Judicial Verdict and Reality

To the disappointment of environmental and health advocates, judicial authorities complied with the request, specifying that eco-friendly pyrotechnics could be ignited during specific hours throughout the festival.

During the celebrations, there was extensive violation of the regulated periods across the capital, with minimal monitoring regarding whether the firecrackers being used were actually the eco-friendly version.

Many air quality sensors throughout the capital showed pollution reaching highest levels around late evening to extremely hazardous measurements seen during celebrations in at least recent memory.

Cross-Border Consequences

The widespread use of fireworks during the celebrations also sparked a blame game with neighbouring the neighboring country, with officials in Pakistan's Punjab province partly blaming declining air quality in Lahore on contaminants originating in neighboring India following the festivities.

Chronic Environmental Problem

The dangerously high levels of atmospheric toxins in the capital have remained as a serious problem for fifteen-plus years, with the condition continuing to worsen.

Around celebratory seasons, the amount of hazardous particulate matter in the air has been observed to shoot up to seventy percent above the most severe records ever recorded in the Chinese city, which was previously regarded as the globally most contaminated city.

Multiple Contamination Sources

This crisis in the city is attributed to a mix of various sources including transportation pollution, construction debris, building projects, garbage fires and smoke from crop residue ignition in nearby areas of neighboring agricultural zones.

Within these states, rural residents routinely set their fields on fire to prepare for next season, creating toxic smog that becomes contained over the metropolitan area as cooler air arrives.

Public Health and Economic Toll

Both financial and medical impact on the roughly thirty-three million people living in the Delhi area is significant, according to various studies.

This pollution results in elevated rates of neurological, heart and circulatory and respiratory conditions, and can result in oncological diseases.

Air quality crisis is calculated to be responsible for approximately 10k premature mortalities each year in Delhi.