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

Alarming Air Quality Readings

Several parts of the city showed an pollution measurement exceeding 500, which equals a tenfold increase over the safe limit established by the World Health Organization.

Particular areas, levels of PM2.5 and PM10 hit highs of eighteen hundred, amounting to 15-20x higher than safe standards.

Fireworks Restrictions and Current Policy Shifts

For the past four years, officials had implemented a complete ban on the sale and use of pyrotechnics during the Festival of Lights due to their substantial impact to the dangerous haze that engulfs the capital as winter sets in.

Yet earlier this year, the newly elected regional government appealed to the judicial authority to request a relaxation of the prohibition.

Officials advocated for allowing "environmentally conscious pyrotechnics" – previously criticized by environmentalists as being only roughly 30 percent less polluting – as a middle ground between "cultural practices and environment".

Judicial Verdict and Enforcement

To the disappointment of medical and ecological advocates, judges agreed to the appeal, stipulating that green firecrackers could be ignited during designated hours throughout the celebrations.

On Monday night, there was widespread violation of the designated hours across the capital, with minimal regulation regarding whether the pyrotechnics being used were actually the more environmentally friendly type.

Many monitoring devices throughout the capital registered air quality spiking around late evening to some of the worst measurements seen during celebrations in at least three years.

International Effects

The proliferation of pyrotechnics during the festival also sparked a blame game with adjacent the neighboring country, with officials in Pakistani Punjab partially attributing declining pollution levels in the city of Lahore on pollutants coming from across the border following the celebrations.

Long-Standing Pollution Issue

The dangerously high levels of air contamination in Delhi have continued as a serious challenge for more than 15 years, with the problem gradually deteriorating.

During celebratory seasons, the concentration of toxic airborne contaminants in the atmosphere has been found to spike to significantly exceeding the peak records ever measured in China's capital, which was previously considered as the globally most contaminated city.

Diverse Contamination Sources

The problem in the city is attributed to a convergence of various sources including transportation pollution, construction debris, development work, rubbish burning and smoke from crop residue ignition in adjacent areas of farming communities.

Within these states, farmers routinely burn crop residue to clear them quickly, creating hazardous smog that remains stagnant over the city as colder air descends.

Medical and Financial Impact

The economic and health toll on the approximately 33 million people living in the Delhi area is substantial, according to multiple investigations.

These hazardous conditions causes increased incidence of nervous system, cardiovascular and lung conditions, and can result in malignancies.

Environmental contamination is estimated to be accounting for ten thousand early deaths annually in Delhi.