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As Tuesday dawned inhabitants of the planet's dirtiest urban center were faced with breathing severely hazardous air that fell into the "severe" range.

Alarming Air Quality Measurements

Multiple areas of the city registered an air quality index exceeding 500, which translates to a tenfold increase over the safe level set by the World Health Organization.

Certain monitoring stations, concentrations of PM2.5 and PM10 hit highs of eighteen hundred, amounting to fifteen to twenty times exceeding acceptable standards.

Firecracker Restrictions and New Policy Shifts

Since 2020, authorities had enforced a complete ban on the distribution and bursting of fireworks during the Festival of Lights due to their significant contribution to the deadly smog that engulfs the capital as the cold season sets in.

Nevertheless earlier this year, the current city government appealed to the highest court to request a modification of the prohibition.

They proposed allowing "environmentally conscious pyrotechnics" – previously questioned by environmentalists as being only approximately one-third reduced emissions – as a middle ground between "cultural practices and ecological concerns".

Court Ruling and Implementation

To the disappointment of environmental and health campaigners, judicial authorities approved the appeal, specifying that environmentally conscious fireworks could be used during specific periods throughout the Diwali.

On Monday night, there was considerable violation of the time restrictions across the metropolis, with minimal monitoring regarding whether the fireworks being used were actually the eco-friendly type.

Several recording stations throughout Delhi registered pollution reaching highest levels around the night hours to the most severe measurements recorded during Diwali in at least three years.

Regional Consequences

The proliferation of firecrackers during Diwali also initiated a dispute with adjacent the neighboring country, with representatives in Pakistan's Punjab province partially attributing worsening air quality in the city of Lahore on contaminants coming from neighboring India following the celebrations.

Long-Standing Pollution Crisis

Extremely elevated concentrations of air contamination in the city have persisted as a significant challenge for more than 15 years, with the situation gradually deteriorating.

Around the festival period, the levels of toxic airborne contaminants in the environment has been found to spike to significantly exceeding the peak readings ever recorded in the Chinese city, which was once viewed as the globally most contaminated metropolis.

Multiple Contamination Contributors

The problem in Delhi is caused by a combination of multiple factors including heavy vehicle emissions, construction debris, construction activities, waste incineration and haze from farm burning in neighbouring states of neighboring agricultural zones.

Within these states, rural residents illegally burn crop residue to clear them quickly, producing toxic pollution that becomes contained over the capital as colder air sets in.

Medical and Economic Toll

Both financial and medical impact on the nearly 33 million inhabitants living in the metropolitan zone is substantial, according to multiple investigations.

The contaminated air leads to elevated rates of neurological, cardiovascular and respiratory disorders, and can result in malignancies.

The pollution is projected to be accounting for 10,000 early fatalities annually in Delhi.