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As Tuesday dawned citizens of the planet's dirtiest urban center were faced with inhaling extremely polluted air that was classified as the "alarming" category.

Record-Breaking Air Quality Readings

Several parts of Delhi recorded an AQI exceeding 500, which equals a tenfold increase over the safe level established by the WHO.

Particular areas, readings of dangerous airborne particles reached peaks of 1,800, representing fifteen to twenty times higher than healthy levels.

Pyrotechnics Restrictions and Recent Changes

Since 2020, authorities had enforced a total prohibition on the sale and use of fireworks during the Festival of Lights due to their substantial impact to the deadly pollution that engulfs the capital as winter sets in.

Nevertheless earlier this year, the recently formed city government petitioned the highest court to request a easing of the restrictions.

The suggestion was allowing "environmentally conscious pyrotechnics" – historically doubted by conservation groups as being only roughly 30 percent less polluting – as a middle ground between "cultural practices and environment".

Judicial Ruling and Reality

Despite concerns of public health and environmental advocates, the court complied with the proposal, specifying that green firecrackers could be used during specific hours throughout the Diwali.

On Monday night, there was widespread flouting of the regulated periods across the city, with little enforcement regarding whether the firecrackers being used were actually the supposedly greener variety.

Several recording stations throughout Delhi showed air quality peaking around the night hours to some of the worst readings seen during Diwali in at least recent memory.

Regional Effects

Extensive ignition of pyrotechnics during the celebrations also initiated a dispute with bordering Pakistan, with officials in Pakistani the Punjab region pointing to declining air quality in Lahore on pollutants traveling from neighboring India following the festivities.

Persistent Environmental Issue

Alarmingly severe readings of pollution in Delhi have persisted as a serious challenge for over a decade and a half, with the situation showing no improvement.

During Diwali, the levels of toxic airborne contaminants in the air has been observed to shoot up to 70% higher the worst readings ever recorded in Beijing, which was previously regarded as the world's most polluted urban center.

Multiple Pollution Factors

The situation in Delhi is attributed to a combination of various sources including heavy vehicle emissions, construction debris, development work, garbage fires and haze from farm burning in nearby regions of neighboring agricultural zones.

Within these states, rural residents regularly set their fields on fire to clear them quickly, creating toxic haze that then gets trapped over the metropolitan area as colder air arrives.

Public Health and Economic Consequences

Both financial and medical toll on the approximately 33 million people living in the Delhi area is significant, according to numerous investigations.

This pollution results in elevated rates of nervous system, heart and circulatory and lung conditions, and can even lead to cancer.

Air quality crisis is estimated to be responsible for approximately 10k premature mortalities annually in the capital.