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As Tuesday dawned citizens of the planet's dirtiest urban center found themselves breathing dangerously toxic air that was classified as the "critical" level.

Record-Breaking Pollution Readings

Several parts of Delhi registered an AQI exceeding 500, which translates to 10x the safe level set by the global health authority.

Certain monitoring stations, readings of PM2.5 and PM10 reached peaks of 1800, representing 15 to 20 times exceeding healthy limits.

Fireworks Ban and New Changes

For the past four years, officials had enforced a comprehensive restriction on the distribution and bursting of fireworks during celebrations due to their major role to the dangerous pollution that blankets the metropolis as winter sets in.

However earlier this year, the newly elected city administration appealed to the highest court to request a relaxation of the prohibition.

They proposed allowing "eco-friendly fireworks" – which have been questioned by conservation groups as being only approximately one-third less polluting – as a balance between "cultural practices and public health".

Judicial Verdict and Implementation

Much to the frustration of public health and environmental advocates, judicial authorities complied with the appeal, mandating that environmentally conscious fireworks could be set off during limited time windows throughout the celebrations.

Throughout the festival evening, there was considerable disregard of the time restrictions across the city, with little enforcement regarding whether the firecrackers being used were actually the supposedly greener version.

Many recording stations throughout the city showed contamination peaking around midnight to extremely hazardous readings observed during celebrations in at least three years.

Regional Implications

Extensive ignition of pyrotechnics during the celebrations also triggered a controversy with neighbouring the neighboring country, with officials in Pakistani the Punjab region partially attributing deteriorating pollution levels in their urban centers on contaminants originating in across the border following the events.

Persistent Pollution Crisis

Alarmingly severe readings of atmospheric toxins in the city have continued as a major issue for over a decade and a half, with the situation continuing to worsen.

Near Diwali, the levels of toxic airborne contaminants in the atmosphere has been observed to shoot up to seventy percent above the worst levels ever documented in China's capital, which was previously considered as the globally most contaminated city.

Multiple Contamination Contributors

This crisis in the city is attributed to a convergence of various sources including heavy vehicle emissions, airborne particles, building projects, waste incineration and pollutants from farm burning in neighbouring areas of farming communities.

Within these states, rural residents illegally set their fields on fire to clear them quickly, creating toxic haze that remains stagnant over the capital as colder air sets in.

Health and Economic Impact

Public health and economic consequences on the approximately 33 million people living in the metropolitan zone is substantial, according to multiple research.

This pollution leads to increased incidence of neurological, cardiovascular and breathing conditions, and can potentially cause cancer.

Air quality crisis is calculated to be accounting for 10,000 untimely fatalities annually in the capital.