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Tuesday brought residents of the planet's dirtiest urban center found themselves inhaling dangerously toxic air that was classified as the "alarming" category.

Extremely High Pollution Levels

Various sections of Delhi registered an AQI above 500, which represents 10x the healthy limit recommended by the World Health Organization.

Certain monitoring stations, concentrations of toxic particulate matter soared to of eighteen hundred, amounting to 15-20x higher than acceptable limits.

Firecracker Restrictions and Current Changes

For the past four years, officials had enforced a comprehensive restriction on the sale and use of fireworks during celebrations due to their significant contribution to the dangerous pollution that covers the metropolis as winter approaches.

Nevertheless recently, the newly elected regional administration appealed to the judicial authority to seek a easing of the ban.

They proposed allowing "green crackers" – historically doubted by environmental experts as being only about 30% lower impact – as a balance between "cultural practices and ecological concerns".

Court Ruling and Reality

To the disappointment of medical and ecological activists, judicial authorities approved the proposal, stipulating that eco-friendly pyrotechnics could be set off during designated hours throughout the Diwali.

During the celebrations, there was widespread violation of the designated hours across the metropolis, with little enforcement regarding whether the fireworks being used were actually the supposedly greener type.

Several recording stations throughout the capital showed contamination reaching highest levels around midnight to the most severe levels recorded during celebrations in at least the past three years.

Cross-Border Consequences

Extensive ignition of pyrotechnics during Diwali also triggered a dispute with adjacent the neighboring country, with officials in Pakistani Punjab partly blaming declining air quality in the city of Lahore on contaminants coming from India following the celebrations.

Long-Standing Environmental Problem

Extremely elevated levels of air contamination in the capital have continued as a serious problem for more than 15 years, with the condition continuing to worsen.

During Diwali, the levels of toxic particles in the environment has been observed to spike to 70% higher the peak levels ever recorded in the Chinese city, which was previously considered as the globally most contaminated city.

Multiple Pollution Sources

The problem in the city is resulting from a mix of different contributors including transportation pollution, construction debris, building projects, rubbish burning and smoke from crop residue ignition in adjacent regions of neighboring agricultural zones.

Within these states, rural residents illegally ignite agricultural waste to expedite field preparation, generating toxic smog that then gets trapped over the capital as winter air sets in.

Medical and Economic Impact

The economic and health toll on the roughly thirty-three million people living in the metropolitan zone is significant, according to numerous investigations.

This pollution leads to high levels of nervous system, cardiovascular and lung conditions, and can potentially cause malignancies.

Air quality crisis is calculated to be accounting for approximately 10k untimely mortalities per year in Delhi.