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As Tuesday dawned citizens of the world's most polluted city encountered exposed to extremely polluted air that fell into the "critical" range.

Extremely High Pollution Levels

Several parts of Delhi registered an air quality index exceeding 500, which represents a tenfold increase over the healthy level recommended by the global health authority.

In some locations, concentrations of dangerous airborne particles soared to of 1,800, representing fifteen to twenty times exceeding healthy limits.

Fireworks Ban and New Changes

Beginning in 2020, authorities had maintained a total prohibition on the sale and use of pyrotechnics during celebrations due to their substantial impact to the dangerous smog that engulfs the capital as colder weather begins.

Nevertheless earlier this year, the current regional administration petitioned the supreme court to request a modification of the restrictions.

They proposed allowing "environmentally conscious pyrotechnics" – which have been questioned by conservation groups as being only approximately one-third less polluting – as a balance between "cultural practices and ecological concerns".

Court Verdict and Reality

Much to the frustration of public health and environmental activists, judges approved the proposal, mandating that eco-friendly pyrotechnics could be ignited during designated hours throughout the Diwali.

Throughout the festival evening, there was widespread violation of the regulated periods across the metropolis, with little regulation regarding whether the fireworks being used were actually the eco-friendly type.

Numerous recording stations throughout Delhi showed air quality reaching highest levels around midnight to extremely hazardous measurements observed during Diwali in at least recent memory.

International Implications

The widespread use of fireworks during the celebrations also initiated a blame game with bordering Pakistan, with officials in Pakistani Punjab province pointing to deteriorating air quality in Lahore on pollutants originating in India following the festivities.

Chronic Pollution Issue

Extremely elevated levels of pollution in the city have continued as a serious problem for over a decade and a half, with the condition continuing to worsen.

During celebratory seasons, the concentration of hazardous particulate matter in the environment has been found to spike to significantly exceeding the peak records ever recorded in Beijing, which was previously regarded as the world's most polluted city.

Multiple Contamination Factors

This crisis in Delhi is caused by a convergence of various sources including transportation pollution, dust, building projects, rubbish burning and haze from crop residue ignition in nearby regions of neighboring agricultural zones.

In these regions, agricultural workers routinely burn crop residue to clear them quickly, creating dangerous haze that becomes contained over the metropolitan area as colder air descends.

Health and Economic Impact

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

The contaminated air causes elevated rates of neurological, cardiovascular and respiratory disorders, and can potentially cause oncological diseases.

Air quality crisis is calculated to be causing approximately 10k early mortalities per year in the capital.