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On Tuesday morning inhabitants of the planet's dirtiest urban center were faced with inhaling extremely polluted air that was classified as the "critical" range.

Record-Breaking Air Quality Levels

Several parts of Delhi registered an pollution measurement over 500, which equals 10x the healthy threshold established by the global health authority.

In some locations, levels of PM2.5 and PM10 soared to of eighteen hundred, equating to 15-20x exceeding acceptable limits.

Fireworks Restrictions and Recent Changes

Since 2020, the government had enforced a comprehensive restriction on the sale and use of fireworks during the Festival of Lights due to their substantial impact to the deadly haze that covers the capital as colder weather approaches.

However earlier this year, the current city government appealed to the supreme court to propose a easing of the ban.

They proposed allowing "eco-friendly fireworks" – which have been questioned by environmental experts as being only about 30% reduced emissions – as a compromise between "heritage and environment".

Judicial Ruling and Enforcement

To the disappointment of medical and ecological advocates, the court approved the proposal, specifying that environmentally conscious fireworks could be used during designated hours throughout the festival.

Throughout the festival evening, there was extensive flouting of the regulated periods across the city, with insufficient monitoring regarding whether the pyrotechnics being used were actually the supposedly greener type.

Numerous air quality sensors throughout Delhi recorded contamination peaking around midnight to some of the worst measurements recorded during Diwali in at least the past three years.

International Implications

The proliferation of pyrotechnics during the festival also sparked a controversy with adjacent the neighboring country, with officials in Pakistan's Punjab province partly blaming deteriorating air quality in the city of Lahore on contaminants coming from India following the events.

Long-Standing Pollution Issue

Extremely elevated readings of pollution in Delhi have remained as a major problem for fifteen-plus years, with the condition gradually deteriorating.

During celebratory seasons, the levels of hazardous particles in the environment has been observed to shoot up to 70% higher the most severe levels ever recorded in China's capital, which was previously regarded as the planet's dirtiest urban center.

Multiple Pollution Factors

This crisis in Delhi is caused by a convergence of multiple factors including automobile exhaust, construction debris, development work, garbage fires and pollutants from farm burning in neighbouring states of Punjab and Haryana.

In these regions, rural residents illegally set their fields on fire to prepare for next season, producing toxic pollution that becomes contained over the metropolitan area as winter air descends.

Health and Economic Consequences

The economic and health toll on the nearly 33 million inhabitants residing in the capital region is significant, according to various studies.

This pollution causes elevated rates of nervous system, cardiovascular and respiratory disorders, and can potentially cause oncological diseases.

Air quality crisis is calculated to be accounting for 10,000 untimely fatalities per year in the city.