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Tuesday brought residents of the world's most polluted city were faced with breathing extremely polluted air that registered in the "alarming" level.

Alarming Air Quality Readings

Several parts of Delhi showed an AQI above 500, which translates to ten times the safe threshold set by the World Health Organization.

Particular areas, levels of PM2.5 and PM10 reached peaks of 1800, equating to 15-20x above safe limits.

Firecracker Prohibition and Current Changes

Beginning in 2020, the government had maintained a comprehensive restriction on the sale and use of pyrotechnics during the Festival of Lights due to their substantial impact to the deadly haze that engulfs the metropolis as winter begins.

However in recent months, the newly elected city leadership approached the highest court to propose a modification of the prohibition.

The suggestion was allowing "green crackers" – which have been doubted by environmental experts as being only approximately one-third reduced emissions – as a compromise between "cultural practices and ecological concerns".

Legal Ruling and Reality

To the disappointment of medical and ecological advocates, judicial authorities approved the request, mandating that eco-friendly pyrotechnics could be used during limited hours throughout the celebrations.

During the celebrations, there was widespread flouting of the designated hours across the capital, with minimal enforcement regarding whether the fireworks being used were actually the eco-friendly type.

Several monitoring devices throughout the capital registered contamination peaking around the night hours to the most severe measurements observed during celebrations in at least recent memory.

Regional Implications

The widespread use of fireworks during Diwali also initiated a dispute with neighbouring the neighboring country, with representatives in Pakistan's Punjab province partly blaming declining air quality in the city of Lahore on contaminants traveling from India following the festivities.

Persistent Environmental Issue

Extremely elevated readings of atmospheric toxins in Delhi have continued as a serious challenge for fifteen-plus years, with the situation gradually deteriorating.

Around the festival period, the levels of hazardous airborne contaminants in the environment has been observed to shoot up to significantly exceeding the most severe records ever recorded in Beijing, which was formerly viewed as the world's most polluted city.

Multiple Pollution Sources

The situation in Delhi is attributed to a combination of different contributors including heavy vehicle emissions, construction debris, building projects, garbage fires and pollutants from agricultural fires in nearby regions of neighboring agricultural zones.

Within these states, agricultural workers regularly ignite agricultural waste to clear them quickly, creating toxic pollution that remains stagnant over the city as winter air sets in.

Public Health and Financial Impact

Public health and economic consequences on the nearly 33 million people calling home the metropolitan zone is substantial, according to multiple research.

This pollution results in high levels of neurological, heart and circulatory and lung disorders, and can even lead to cancer.

Environmental contamination is calculated to be causing 10,000 early deaths each year in the capital.