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As Tuesday dawned inhabitants of the world's most polluted city were faced with breathing severely hazardous air that fell into the "alarming" level.

Extremely High Pollution Levels

Various sections of the capital showed an pollution measurement exceeding 500, which translates to 10x the safe limit set by the global health authority.

In some locations, concentrations of PM2.5 and PM10 soared to of 1800, amounting to 15-20x above acceptable limits.

Fireworks Restrictions and Recent Policy Shifts

Since 2020, authorities had enforced a total prohibition on the distribution and bursting of pyrotechnics during the Festival of Lights due to their major role to the deadly pollution that covers the city as the cold season begins.

However recently, the newly elected local government appealed to the supreme court to propose a easing of the prohibition.

The suggestion was allowing "eco-friendly fireworks" – previously doubted by conservation groups as being only approximately one-third lower impact – as a middle ground between "tradition and ecological concerns".

Legal Decision and Reality

Much to the frustration of public health and environmental campaigners, the court approved the proposal, stipulating that green firecrackers could be ignited during limited hours throughout the Diwali.

Throughout the festival evening, there was considerable flouting of the designated hours across the capital, with insufficient monitoring regarding whether the pyrotechnics being used were actually the more environmentally friendly type.

Many air quality sensors throughout the city recorded air quality reaching highest levels around late evening to the most severe measurements recorded during Diwali in at least recent memory.

Regional Effects

The proliferation of pyrotechnics during Diwali also sparked a controversy with adjacent the neighboring country, with authorities in Pakistan's the Punjab region partially attributing worsening pollution levels in Lahore on hazardous particles originating in India following the celebrations.

Chronic Pollution Crisis

The dangerously high levels of air contamination in Delhi have persisted as a serious challenge for over a decade and a half, with the problem showing no improvement.

During the festival period, the levels of dangerous particles in the environment has been observed to spike to significantly exceeding the peak levels ever recorded in China's capital, which was once considered as the world's most polluted metropolis.

Various Pollution Factors

The situation in Delhi is resulting from a convergence of multiple factors including heavy vehicle emissions, airborne particles, development work, rubbish burning and pollutants from crop residue ignition in nearby areas of Punjab and Haryana.

Throughout these areas, farmers regularly ignite agricultural waste to expedite field preparation, producing dangerous pollution that then gets trapped over the metropolitan area as winter air sets in.

Health and Financial Toll

Both financial and medical impact on the roughly thirty-three million residents calling home the metropolitan zone is enormous, according to multiple studies.

The contaminated air results in high levels of nervous system, cardiovascular and breathing disorders, and can potentially cause oncological diseases.

The pollution is projected to be accounting for approximately 10k early mortalities per year in Delhi.