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On Tuesday morning residents of the planet's dirtiest urban center found themselves inhaling severely hazardous air that fell into the "alarming" level.

Record-Breaking Pollution Levels

Several parts of Delhi recorded an air quality index above 500, which translates to ten times the recommended threshold recommended by the World Health Organization.

Particular areas, levels of toxic particulate matter hit highs of 1800, amounting to 15-20x higher than acceptable limits.

Fireworks Ban and Recent Policy Shifts

For the past four years, officials had enforced a comprehensive restriction on the purchase and ignition of firecrackers during Diwali due to their significant contribution to the hazardous smog that covers the metropolis as colder weather sets in.

However earlier this year, the recently formed local government petitioned the supreme court to propose a modification of the restrictions.

The suggestion was allowing "green crackers" – previously doubted by conservation groups as being only approximately one-third less polluting – as a middle ground between "heritage and public health".

Legal Verdict and Enforcement

Despite concerns of medical and ecological activists, judicial authorities approved the request, stipulating that green firecrackers could be ignited during specific hours throughout the celebrations.

On Monday night, there was widespread disregard of the regulated periods across the metropolis, with minimal monitoring regarding whether the fireworks being used were actually the eco-friendly type.

Several monitoring devices throughout the city showed air quality spiking around late evening to extremely hazardous levels recorded during Diwali in at least three years.

International Consequences

The proliferation of fireworks during the celebrations also sparked a blame game with neighbouring the neighboring country, with authorities in Pakistani the Punjab region partially attributing declining pollution levels in Lahore on contaminants traveling from across the border following the festivities.

Chronic Pollution Crisis

Extremely elevated readings of air contamination in Delhi have continued as a significant problem for more than 15 years, with the condition gradually deteriorating.

During Diwali, the amount of dangerous particulate matter in the atmosphere has been observed to spike to significantly exceeding the most severe levels ever documented in the Chinese city, which was formerly regarded as the globally most contaminated metropolis.

Various Pollution Factors

The problem in Delhi is caused by a convergence of different contributors including transportation pollution, construction debris, development work, waste incineration and haze from crop residue ignition in adjacent states of farming communities.

Throughout these areas, farmers illegally ignite agricultural waste to prepare for next season, creating toxic haze that remains stagnant over the city as winter air arrives.

Medical and Economic Toll

Public health and economic toll on the roughly thirty-three million residents residing in the metropolitan zone is significant, according to numerous studies.

This pollution causes increased incidence of neurological, heart and circulatory and lung diseases, and can potentially cause malignancies.

Air quality crisis is projected to be responsible for ten thousand untimely fatalities annually in Delhi.