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On Tuesday morning inhabitants of the world's most polluted city were faced with exposed to extremely polluted air that was classified as the "critical" category.

Alarming Pollution Measurements

Various sections of the city registered an AQI over 500, which translates to 10x the healthy level established by the World Health Organization.

In some locations, levels of dangerous airborne particles reached peaks of 1,800, representing 15 to 20 times exceeding acceptable limits.

Pyrotechnics Prohibition and Recent Changes

Beginning in 2020, authorities had maintained a comprehensive restriction on the sale and use of firecrackers during Diwali due to their substantial impact to the hazardous pollution that engulfs the city as colder weather approaches.

Nevertheless earlier this year, the recently formed city government approached the highest court to request a relaxation of the prohibition.

They proposed allowing "green crackers" – historically doubted by conservation groups as being only roughly 30 percent lower impact – as a compromise between "cultural practices and environment".

Legal Verdict and Implementation

To the disappointment of medical and ecological advocates, judicial authorities approved the proposal, mandating that eco-friendly pyrotechnics could be set off during designated periods throughout the festival.

During the celebrations, there was considerable violation of the time restrictions across the capital, with little enforcement regarding whether the fireworks being used were actually the eco-friendly variety.

Numerous recording stations throughout the capital showed air quality spiking around midnight to extremely hazardous measurements seen during the festival in at least recent memory.

International Implications

Extensive ignition of firecrackers during Diwali also initiated a blame game with bordering Pakistan, with officials in Pakistan's Punjab partly blaming worsening atmospheric conditions in Lahore on contaminants originating in India following the festivities.

Chronic Environmental Crisis

Alarmingly severe concentrations of atmospheric toxins in Delhi have persisted as a serious challenge for fifteen-plus years, with the problem showing no improvement.

Around Diwali, the amount of hazardous particles in the atmosphere has been observed to spike to significantly exceeding the worst readings ever documented in China's capital, which was formerly considered as the globally most contaminated city.

Various Pollution Factors

The problem in Delhi is attributed to a mix of different contributors including heavy vehicle emissions, airborne particles, development work, garbage fires and smoke from crop residue ignition in neighbouring states of Punjab and Haryana.

Within these states, agricultural workers illegally ignite agricultural waste to clear them quickly, creating toxic pollution that remains stagnant over the city as cooler air arrives.

Medical and Financial Consequences

Public health and economic toll on the roughly thirty-three million people residing in the Delhi area is enormous, according to various studies.

This pollution causes increased incidence of nervous system, cardiovascular and lung diseases, and can potentially cause cancer.

Air quality crisis is calculated to be causing 10,000 untimely mortalities each year in the capital.