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On Tuesday morning residents of the world's most polluted city found themselves breathing dangerously toxic air that was classified as the "critical" range.

Alarming Air Quality Measurements

Several parts of the capital showed an AQI above 500, which equals a tenfold increase over the safe threshold recommended by the WHO.

Certain monitoring stations, readings of dangerous airborne particles reached peaks of 1800, amounting to fifteen to twenty times exceeding healthy levels.

Fireworks Prohibition and Recent Policy Shifts

Beginning in 2020, officials had maintained a complete ban on the distribution and bursting of firecrackers during the Festival of Lights due to their significant contribution to the deadly pollution that covers the metropolis as colder weather approaches.

Yet recently, the newly elected city government appealed to the highest court to propose a relaxation of the restrictions.

The suggestion was allowing "eco-friendly fireworks" – historically doubted by environmentalists as being only about 30% lower impact – as a compromise between "tradition and ecological concerns".

Court Verdict and Reality

To the disappointment of medical and ecological activists, judicial authorities complied with the proposal, stipulating that environmentally conscious fireworks could be used during specific hours throughout the festival.

During the celebrations, there was extensive flouting of the regulated periods across the metropolis, with little monitoring regarding whether the pyrotechnics being used were actually the eco-friendly version.

Numerous recording stations throughout Delhi showed contamination reaching highest levels around midnight to extremely hazardous levels seen during Diwali in at least recent memory.

International Effects

The widespread use of pyrotechnics during the celebrations also sparked a blame game with adjacent Pakistan, with officials in Pakistan's the Punjab region pointing to deteriorating air quality in the city of Lahore on contaminants originating in across the border following the festivities.

Chronic Environmental Problem

Extremely elevated levels of air contamination in the city have continued as a major problem for fifteen-plus years, with the problem showing no improvement.

Around celebratory seasons, the concentration of toxic airborne contaminants in the atmosphere has been observed to shoot up to 70% higher the worst readings ever documented in China's capital, which was formerly considered as the planet's dirtiest city.

Various Contamination Contributors

The situation in the capital is resulting from a combination of various sources including heavy vehicle emissions, construction debris, building projects, waste incineration and pollutants from agricultural fires in neighbouring areas of farming communities.

In these regions, farmers routinely ignite agricultural waste to prepare for next season, creating hazardous pollution that remains stagnant over the metropolitan area as colder air sets in.

Health and Financial Impact

Public health and economic toll on the roughly thirty-three million inhabitants residing in the metropolitan zone is substantial, according to multiple investigations.

This pollution causes elevated rates of nervous system, cardiovascular and breathing diseases, and can result in oncological diseases.

Air quality crisis is projected to be accounting for approximately 10k premature mortalities each year in the city.