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On Tuesday morning citizens of the world's most polluted city found themselves exposed to severely hazardous air that registered in the "critical" range.

Alarming Air Quality Measurements

Several parts of Delhi recorded an pollution measurement over 500, which equals a tenfold increase over the healthy threshold recommended by the global health authority.

Particular areas, levels of dangerous airborne particles hit highs of 1800, amounting to fifteen to twenty times exceeding healthy levels.

Pyrotechnics Prohibition and Current Policy Shifts

For the past four years, authorities had implemented a complete ban on the distribution and bursting of firecrackers during Diwali due to their significant contribution to the hazardous smog that blankets the metropolis as the cold season begins.

Nevertheless in recent months, the newly elected local administration petitioned the highest court to seek a relaxation of the ban.

They proposed allowing "green crackers" – historically questioned by conservation groups as being only about 30% reduced emissions – as a middle ground between "heritage and ecological concerns".

Court Ruling and Enforcement

Much to the frustration of public health and environmental advocates, judges approved the proposal, specifying that eco-friendly pyrotechnics could be used during specific time windows throughout the Diwali.

During the celebrations, there was extensive disregard of the regulated periods across the capital, with insufficient regulation regarding whether the pyrotechnics being used were actually the supposedly greener type.

Several air quality sensors throughout the capital showed air quality reaching highest levels around the night hours to some of the worst readings seen during Diwali in at least three years.

Regional Implications

The proliferation of firecrackers during the festival also sparked a dispute with neighbouring the neighboring country, with officials in Pakistan's Punjab province partially attributing worsening pollution levels in the city of Lahore on contaminants traveling from neighboring India following the celebrations.

Chronic Environmental Crisis

The dangerously high levels of atmospheric toxins in the capital have continued as a serious challenge for fifteen-plus years, with the situation showing no improvement.

During Diwali, the amount of hazardous airborne contaminants in the atmosphere has been documented to increase dramatically to significantly exceeding the peak readings ever measured in Beijing, which was formerly regarded as the planet's dirtiest urban center.

Diverse Contamination Contributors

This crisis in the capital is resulting from a convergence of different contributors including heavy vehicle emissions, dust, development work, rubbish burning and smoke from crop residue ignition in adjacent states of Punjab and Haryana.

Within these states, rural residents illegally ignite agricultural waste to clear them quickly, generating toxic pollution that becomes contained over the city as cooler air descends.

Health and Economic Toll

The economic and health toll on the roughly thirty-three million people living in the metropolitan zone is substantial, according to various research.

The contaminated air causes increased incidence of neurological, heart and circulatory and lung diseases, and can even lead to oncological diseases.

Air quality crisis is projected to be causing ten thousand premature mortalities annually in the city.