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Tuesday brought inhabitants of this heavily contaminated metropolis found themselves inhaling dangerously toxic air that registered in the "critical" category.

Extremely High Air Quality Measurements

Multiple areas of the capital registered an AQI above 500, which translates to ten times the recommended level set by the World Health Organization.

Particular areas, readings of dangerous airborne particles reached peaks of 1,800, equating to 15 to 20 times exceeding healthy standards.

Pyrotechnics Restrictions and New Changes

Since 2020, officials had maintained a total prohibition on the distribution and bursting of pyrotechnics during Diwali due to their major role to the deadly smog that covers the metropolis as winter approaches.

Nevertheless recently, the newly elected regional leadership petitioned the supreme court to request a modification of the restrictions.

Officials advocated for allowing "green crackers" – which have been questioned by conservation groups as being only roughly 30 percent less polluting – as a balance between "cultural practices and environment".

Judicial Verdict and Reality

Despite concerns of medical and ecological campaigners, the court agreed to the appeal, mandating that green firecrackers could be ignited during specific time windows throughout the celebrations.

Throughout the festival evening, there was considerable violation of the designated hours across the metropolis, with insufficient regulation regarding whether the pyrotechnics being used were actually the supposedly greener variety.

Numerous air quality sensors throughout the city showed pollution peaking around late evening to the most severe measurements recorded during celebrations in at least the past three years.

Cross-Border Effects

Extensive ignition of fireworks during the festival also sparked a blame game with bordering the neighboring country, with authorities in Pakistan's Punjab province partly blaming worsening atmospheric conditions in their urban centers on pollutants coming from neighboring India following the celebrations.

Persistent Pollution Issue

Alarmingly severe concentrations of air contamination in Delhi have persisted as a serious challenge for over a decade and a half, with the situation continuing to worsen.

During the festival period, the concentration of dangerous particles in the atmosphere has been found to increase dramatically to 70% higher the worst records ever measured in the Chinese city, which was once viewed as the planet's dirtiest metropolis.

Various Contamination Sources

The situation in the capital is attributed to a combination of multiple factors including transportation pollution, construction debris, development work, waste incineration and haze from agricultural fires in neighbouring areas of farming communities.

In these regions, agricultural workers illegally set their fields on fire to expedite field preparation, generating toxic pollution that remains stagnant over the city as colder air descends.

Medical and Economic Toll

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

These hazardous conditions leads to increased incidence of nervous system, heart and circulatory and breathing conditions, and can potentially cause cancer.

Environmental contamination is projected to be accounting for 10,000 early deaths each year in the capital.