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Tuesday brought inhabitants of this heavily contaminated metropolis found themselves inhaling extremely polluted air that registered in the "critical" category.

Alarming Air Quality Measurements

Various sections of the capital recorded an air quality index above 500, which translates to ten times the safe limit set by the global health authority.

Particular areas, levels of dangerous airborne particles soared to of 1,800, equating to 15-20x higher than healthy limits.

Firecracker Ban and Recent Policy Shifts

Since 2020, authorities had implemented a comprehensive restriction on the distribution and bursting of pyrotechnics during celebrations due to their significant contribution to the deadly smog that covers the metropolis as colder weather approaches.

However earlier this year, the current local leadership petitioned the highest court to propose a easing of the restrictions.

The suggestion was allowing "green crackers" – previously questioned by environmentalists as being only roughly 30 percent less polluting – as a compromise between "cultural practices and public health".

Judicial Ruling and Enforcement

To the disappointment of medical and ecological activists, judicial authorities agreed to the proposal, specifying that eco-friendly pyrotechnics could be ignited during specific hours throughout the Diwali.

Throughout the festival evening, there was widespread flouting of the designated hours across the metropolis, with little monitoring regarding whether the pyrotechnics being used were actually the eco-friendly version.

Several monitoring devices throughout the city recorded pollution spiking around the night hours to the most severe measurements observed during celebrations in at least the past three years.

International Implications

The proliferation of pyrotechnics during Diwali also triggered a blame game with bordering Pakistan, with authorities in Pakistan's Punjab province partially attributing declining air quality in their urban centers on hazardous particles traveling from India following the celebrations.

Chronic Pollution Issue

The dangerously high levels of pollution in the capital have remained as a serious issue for over a decade and a half, with the condition showing no improvement.

During celebratory seasons, the concentration of dangerous airborne contaminants in the atmosphere has been found to increase dramatically to 70% higher the most severe records ever documented in the Chinese city, which was formerly viewed as the globally most contaminated city.

Diverse Pollution Factors

This crisis in Delhi is attributed to a convergence of different contributors including heavy vehicle emissions, airborne particles, building projects, waste incineration and pollutants from agricultural fires in adjacent areas of neighboring agricultural zones.

In these regions, rural residents regularly set their fields on fire to clear them quickly, generating hazardous haze that then gets trapped over the metropolitan area as winter air sets in.

Health and Financial Toll

Public health and economic consequences on the nearly 33 million residents living in the metropolitan zone is enormous, according to various research.

The contaminated air leads to elevated rates of nervous system, cardiovascular and respiratory diseases, and can potentially cause oncological diseases.

Air quality crisis is calculated to be accounting for 10,000 early deaths each year in Delhi.