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Tuesday brought citizens of this heavily contaminated metropolis found themselves breathing extremely polluted air that registered in the "critical" category.

Extremely High Air Quality Readings

Several parts of the city recorded an AQI above 500, which translates to a tenfold increase over the safe threshold recommended by the World Health Organization.

Particular areas, readings of toxic particulate matter reached peaks of eighteen hundred, equating to fifteen to twenty times higher than safe levels.

Fireworks Ban and New Policy Shifts

Since 2020, the government had maintained a complete ban on the sale and use of pyrotechnics during the Festival of Lights due to their substantial impact to the deadly pollution that covers the city as the cold season approaches.

However earlier this year, the recently formed regional administration appealed to the supreme court to propose a relaxation of the restrictions.

Officials advocated for allowing "eco-friendly fireworks" – which have been doubted by environmentalists as being only roughly 30 percent less polluting – as a balance between "cultural practices and public health".

Court Verdict and Enforcement

To the disappointment of medical and ecological activists, the court complied with the request, specifying that eco-friendly pyrotechnics could be ignited during limited time windows throughout the celebrations.

On Monday night, there was widespread disregard of the time restrictions across the city, with insufficient enforcement regarding whether the pyrotechnics being used were actually the supposedly greener version.

Numerous recording stations throughout the capital showed air quality reaching highest levels around midnight to the most severe measurements recorded during Diwali in at least the past three years.

Cross-Border Implications

Extensive ignition of fireworks during Diwali also triggered a blame game with bordering Pakistan, with officials in Pakistani Punjab province pointing to declining atmospheric conditions in their urban centers on hazardous particles traveling from neighboring India following the celebrations.

Persistent Pollution Crisis

Alarmingly severe readings of air contamination in Delhi have persisted as a significant problem for fifteen-plus years, with the problem showing no improvement.

Around the festival period, the levels of hazardous particulate matter in the environment has been documented to shoot up to significantly exceeding the most severe records ever documented in the Chinese city, which was once regarded as the world's most polluted city.

Multiple Pollution Contributors

The situation in Delhi is attributed to a combination of multiple factors including transportation pollution, airborne particles, development work, rubbish burning and haze from crop residue ignition in nearby states of Punjab and Haryana.

In these regions, rural residents routinely set their fields on fire to clear them quickly, creating toxic haze that remains stagnant over the capital as cooler air sets in.

Health and Financial Impact

Both financial and medical impact on the approximately 33 million residents residing in the metropolitan zone is substantial, according to numerous studies.

These hazardous conditions leads to high levels of neurological, heart and circulatory and respiratory diseases, and can even lead to cancer.

Air quality crisis is estimated to be responsible for ten thousand premature mortalities annually in the city.