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Tuesday brought inhabitants of the world's most polluted city found themselves exposed to severely hazardous air that fell into the "alarming" level.

Alarming Air Quality Readings

Various sections of the capital showed an AQI above 500, which represents 10x the recommended threshold recommended by the WHO.

Particular areas, concentrations of PM2.5 and PM10 soared to of eighteen hundred, representing 15 to 20 times exceeding safe limits.

Pyrotechnics Prohibition and Recent Changes

For the past four years, authorities had enforced a complete ban on the purchase and ignition of pyrotechnics during celebrations due to their major role to the dangerous haze that blankets the capital as the cold season approaches.

Yet earlier this year, the newly elected city government approached the supreme court to request a easing of the ban.

The suggestion was allowing "green crackers" – historically doubted by conservation groups as being only roughly 30 percent lower impact – as a compromise between "tradition and public health".

Legal Verdict and Reality

Much to the frustration of medical and ecological activists, judicial authorities approved the appeal, stipulating that green firecrackers could be set off during designated time windows throughout the Diwali.

Throughout the festival evening, there was extensive flouting of the designated hours across the metropolis, with insufficient regulation regarding whether the firecrackers being used were actually the supposedly greener type.

Numerous monitoring devices throughout the capital recorded pollution reaching highest levels around the night hours to extremely hazardous readings seen during the festival in at least recent memory.

Regional Implications

Extensive ignition of firecrackers during the festival also sparked a controversy with neighbouring Pakistan, with officials in Pakistani Punjab partly blaming declining air quality in the city of Lahore on hazardous particles coming from across the border following the celebrations.

Persistent Environmental Crisis

Extremely elevated levels of air contamination in the city have persisted as a significant problem for fifteen-plus years, with the problem continuing to worsen.

During Diwali, the amount of dangerous particles in the atmosphere has been found to spike to seventy percent above the peak readings ever measured in Beijing, which was formerly considered as the globally most contaminated metropolis.

Various Contamination Sources

The problem in the capital is attributed to a mix of various sources including automobile exhaust, airborne particles, building projects, garbage fires and smoke from farm burning in neighbouring states of Punjab and Haryana.

Throughout these areas, rural residents routinely ignite agricultural waste to clear them quickly, generating dangerous pollution that becomes contained over the capital as colder air descends.

Health and Financial Impact

Both financial and medical impact on the roughly thirty-three million people living in the metropolitan zone is significant, according to multiple research.

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

Air quality crisis is estimated to be accounting for approximately 10k untimely fatalities annually in the capital.