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Tuesday brought citizens of the world's most polluted city found themselves breathing dangerously toxic air that registered in the "severe" level.

Alarming Pollution Levels

Various sections of the city showed an air quality index above 500, which represents a tenfold increase over the healthy level established by the WHO.

Particular areas, readings of dangerous airborne particles soared to of 1800, representing 15 to 20 times higher than acceptable limits.

Fireworks Prohibition and Recent Policy Shifts

Since 2020, the government had enforced a comprehensive restriction on the sale and use of firecrackers during Diwali due to their substantial impact to the deadly haze that covers the capital as the cold season approaches.

Yet recently, the current regional leadership petitioned the supreme court to request a easing of the ban.

They proposed allowing "eco-friendly fireworks" – previously doubted by conservation groups as being only approximately one-third reduced emissions – as a balance between "cultural practices and ecological concerns".

Legal Verdict and Reality

Much to the frustration of public health and environmental campaigners, judges agreed to the appeal, specifying that eco-friendly pyrotechnics could be ignited during specific time windows throughout the Diwali.

On Monday night, there was widespread flouting of the designated hours across the city, with little enforcement regarding whether the pyrotechnics being used were actually the supposedly greener version.

Several air quality sensors throughout the city registered contamination spiking around the night hours to the most severe readings seen during celebrations in at least recent memory.

Regional Implications

Extensive ignition of pyrotechnics during Diwali also initiated a blame game with neighbouring Pakistan, with authorities in Pakistan's Punjab province partly blaming worsening atmospheric conditions in the city of Lahore on contaminants traveling from neighboring India following the celebrations.

Long-Standing Environmental Crisis

The dangerously high levels of air contamination in Delhi have persisted as a major problem for more than 15 years, with the situation continuing to worsen.

Near Diwali, the amount of dangerous particulate matter in the atmosphere has been observed to shoot up to seventy percent above the peak readings ever recorded in China's capital, which was once viewed as the world's most polluted city.

Various Pollution Sources

The problem in the capital is resulting from a combination of various sources including automobile exhaust, construction debris, building projects, garbage fires and pollutants from crop residue ignition in nearby regions of Punjab and Haryana.

Throughout these areas, rural residents illegally burn crop residue to prepare for next season, producing toxic smog that becomes contained over the city as colder air sets in.

Public Health and Financial Toll

Public health and economic toll on the nearly 33 million inhabitants calling home the Delhi area is significant, according to multiple research.

The contaminated air causes increased incidence of nervous system, cardiovascular and lung diseases, and can potentially cause malignancies.

Air quality crisis is calculated to be accounting for approximately 10k early deaths per year in the capital.