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Tuesday brought inhabitants of the world's most polluted city found themselves breathing severely hazardous air that was classified as the "alarming" range.

Record-Breaking Air Quality Measurements

Various sections of Delhi recorded an pollution measurement exceeding 500, which equals a tenfold increase over the healthy limit recommended by the global health authority.

Particular areas, concentrations of toxic particulate matter soared to of 1800, amounting to 15 to 20 times higher than safe standards.

Fireworks Ban and Recent Policy Shifts

For the past four years, officials had enforced a total prohibition on the sale and use of pyrotechnics during Diwali due to their significant contribution to the deadly haze that engulfs the city as the cold season approaches.

Nevertheless earlier this year, the recently formed regional administration approached the judicial authority to seek a modification of the restrictions.

They proposed allowing "environmentally conscious pyrotechnics" – which have been questioned by environmental experts as being only about 30% reduced emissions – as a middle ground between "tradition and environment".

Legal Verdict and Enforcement

To the disappointment of environmental and health activists, the court agreed to the proposal, specifying that green firecrackers could be used during specific hours throughout the Diwali.

During the celebrations, there was considerable flouting of the designated hours across the city, with little regulation regarding whether the firecrackers being used were actually the more environmentally friendly type.

Many recording stations throughout the city recorded air quality spiking around midnight to some of the worst readings observed during Diwali in at least recent memory.

Cross-Border Effects

The proliferation of firecrackers during Diwali also sparked a dispute with neighbouring Pakistan, with representatives in Pakistani Punjab partly blaming declining pollution levels in the city of Lahore on hazardous particles coming from across the border following the events.

Chronic Environmental Issue

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

During the festival period, the amount of toxic particles in the environment has been found to increase dramatically to significantly exceeding the most severe records ever recorded in Beijing, which was formerly considered as the world's most polluted metropolis.

Multiple Contamination Factors

The problem in the city is caused by a convergence of various sources including automobile exhaust, airborne particles, building projects, rubbish burning and haze from agricultural fires in adjacent states of Punjab and Haryana.

In these regions, agricultural workers illegally burn crop residue to prepare for next season, generating hazardous smog that then gets trapped over the metropolitan area as winter air descends.

Public Health and Economic Toll

The economic and health consequences on the nearly 33 million inhabitants living in the Delhi area is significant, according to multiple research.

These hazardous conditions causes increased incidence of nervous system, cardiovascular and lung diseases, and can even lead to cancer.

Environmental contamination is estimated to be causing ten thousand premature fatalities each year in the capital.