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Tuesday brought citizens of this heavily contaminated metropolis found themselves inhaling severely hazardous air that fell into the "severe" range.

Record-Breaking Pollution Readings

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

Particular areas, readings of toxic particulate matter reached peaks of 1,800, representing 15 to 20 times above acceptable levels.

Firecracker Ban and Recent Changes

Since 2020, authorities had enforced a comprehensive restriction on the purchase and ignition of fireworks during celebrations due to their major role to the dangerous smog that engulfs the capital as winter sets in.

However in recent months, the current regional government approached the judicial authority to request a easing of the restrictions.

Officials advocated for allowing "environmentally conscious pyrotechnics" – historically criticized by environmental experts as being only about 30% less polluting – as a middle ground between "heritage and ecological concerns".

Legal Ruling and Implementation

To the disappointment of environmental and health advocates, judges complied with the proposal, mandating that environmentally conscious fireworks could be used during specific hours throughout the festival.

During the celebrations, there was considerable violation of the designated hours across the metropolis, with insufficient monitoring regarding whether the pyrotechnics being used were actually the more environmentally friendly variety.

Many recording stations throughout the capital showed contamination peaking around late evening to some of the worst levels recorded during celebrations in at least recent memory.

International Consequences

The proliferation of firecrackers during Diwali also sparked a controversy with bordering Pakistan, with authorities in Pakistani Punjab pointing to declining atmospheric conditions in the city of Lahore on contaminants traveling from India following the celebrations.

Long-Standing Pollution Crisis

Alarmingly severe concentrations of air contamination in the city have remained as a serious challenge for fifteen-plus years, with the problem continuing to worsen.

During the festival period, the levels of dangerous particulate matter in the air has been documented to spike to 70% higher the most severe records ever recorded in the Chinese city, which was once viewed as the globally most contaminated urban center.

Multiple Contamination Sources

The problem in the city is attributed to a mix of different contributors including transportation pollution, dust, development work, waste incineration and haze from agricultural fires in neighbouring regions of neighboring agricultural zones.

In these regions, agricultural workers illegally set their fields on fire to expedite field preparation, generating toxic haze that becomes contained over the metropolitan area as winter air arrives.

Medical and Economic Consequences

Both financial and medical consequences on the roughly thirty-three million people residing in the capital region is enormous, according to multiple studies.

The contaminated air leads to high levels of neurological, cardiovascular and respiratory conditions, and can even lead to oncological diseases.

Air quality crisis is calculated to be accounting for approximately 10k premature fatalities annually in Delhi.