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On Tuesday morning inhabitants of this heavily contaminated metropolis found themselves inhaling severely hazardous air that fell into the "alarming" category.

Alarming Air Quality Measurements

Several parts of the capital showed an AQI exceeding 500, which equals 10x the recommended threshold set by the global health authority.

In some locations, levels of dangerous airborne particles hit highs of 1,800, representing 15-20x above acceptable standards.

Firecracker Prohibition and Current Policy Shifts

Since 2020, the government had enforced a comprehensive restriction on the distribution and bursting of pyrotechnics during Diwali due to their significant contribution to the deadly pollution that blankets the capital as colder weather approaches.

Yet recently, the current city administration appealed to the highest court to seek a easing of the restrictions.

Officials advocated for allowing "green crackers" – historically criticized by environmental experts as being only roughly 30 percent less polluting – as a compromise between "tradition and environment".

Legal Verdict and Enforcement

Despite concerns of environmental and health advocates, judges approved the appeal, specifying that environmentally conscious fireworks could be used during limited time windows throughout the festival.

On Monday night, there was considerable flouting of the time restrictions across the city, with minimal regulation regarding whether the fireworks being used were actually the more environmentally friendly variety.

Many recording stations throughout Delhi showed pollution reaching highest levels around late evening to extremely hazardous readings recorded during the festival in at least three years.

Regional Effects

Extensive ignition of pyrotechnics during the festival also initiated a controversy with adjacent Pakistan, with officials in Pakistani Punjab province partially attributing worsening atmospheric conditions in the city of Lahore on hazardous particles coming from India following the celebrations.

Long-Standing Environmental Issue

Alarmingly severe levels of atmospheric toxins in the city have continued as a significant challenge for fifteen-plus years, with the situation continuing to worsen.

Near celebratory seasons, the concentration of toxic particulate matter in the atmosphere has been found to shoot up to significantly exceeding the most severe records ever measured in China's capital, which was previously considered as the world's most polluted city.

Diverse Contamination Factors

The situation in Delhi is resulting from a combination of multiple factors including automobile exhaust, dust, building projects, rubbish burning and smoke from farm burning in neighbouring regions of farming communities.

Within these states, agricultural workers regularly ignite agricultural waste to expedite field preparation, generating dangerous haze that then gets trapped over the capital as cooler air sets in.

Health and Economic Consequences

Both financial and medical consequences on the roughly thirty-three million inhabitants calling home the metropolitan zone is significant, according to various research.

The contaminated air leads to increased incidence of neurological, cardiovascular and lung diseases, and can result in oncological diseases.

The pollution is estimated to be accounting for approximately 10k early mortalities annually in Delhi.