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Tuesday brought residents of the world's most polluted city found themselves exposed to extremely polluted air that registered in the "critical" level.

Record-Breaking Air Quality Readings

Several parts of the capital registered an AQI over 500, which represents ten times the recommended limit established by the global health authority.

Certain monitoring stations, readings of dangerous airborne particles hit highs of 1800, equating to fifteen to twenty times above safe levels.

Pyrotechnics Restrictions and Recent Changes

Beginning in 2020, the government had implemented a complete ban on the sale and use of fireworks during the Festival of Lights due to their substantial impact to the hazardous haze that covers the city as the cold season sets in.

Nevertheless in recent months, the recently formed regional government petitioned the highest court to propose a modification of the prohibition.

They proposed allowing "environmentally conscious pyrotechnics" – which have been criticized by conservation groups as being only roughly 30 percent reduced emissions – as a balance between "cultural practices and ecological concerns".

Legal Decision and Implementation

Despite concerns of public health and environmental activists, judicial authorities complied with the proposal, mandating that environmentally conscious fireworks could be set off during limited time windows throughout the festival.

On Monday night, there was considerable disregard of the designated hours across the metropolis, with minimal regulation regarding whether the fireworks being used were actually the supposedly greener version.

Many recording stations throughout Delhi registered pollution peaking around the night hours to some of the worst readings seen during Diwali in at least recent memory.

Cross-Border Implications

The widespread use of pyrotechnics during the festival also triggered a controversy with bordering Pakistan, with officials in Pakistan's Punjab pointing to declining air quality in the city of Lahore on hazardous particles traveling from neighboring India following the celebrations.

Persistent Environmental Problem

Extremely elevated concentrations of air contamination in the city have persisted as a serious problem for over a decade and a half, with the situation continuing to worsen.

Near Diwali, the levels of dangerous particles in the air has been found to increase dramatically to seventy percent above the peak readings ever documented in China's capital, which was once considered as the globally most contaminated urban center.

Various Pollution Sources

The problem in Delhi is attributed to a mix of different contributors including heavy vehicle emissions, airborne particles, building projects, waste incineration and haze from crop residue ignition in neighbouring areas of farming communities.

In these regions, rural residents routinely set their fields on fire to clear them quickly, creating toxic pollution that then gets trapped over the metropolitan area as cooler air sets in.

Medical and Financial Toll

Public health and economic impact on the roughly thirty-three million people living in the Delhi area is substantial, according to multiple research.

This pollution causes increased incidence of neurological, heart and circulatory and respiratory diseases, and can even lead to cancer.

Air quality crisis is projected to be responsible for ten thousand premature mortalities per year in the city.