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Tuesday brought residents of the planet's dirtiest urban center found themselves exposed to severely hazardous air that fell into the "critical" range.

Extremely High Pollution Levels

Various sections of the city registered an AQI over 500, which equals 10x the healthy threshold set by the World Health Organization.

In some locations, concentrations of toxic particulate matter reached peaks of 1,800, equating to 15 to 20 times above safe standards.

Firecracker Restrictions and Current Policy Shifts

Beginning in 2020, the government had enforced a comprehensive restriction on the distribution and bursting of fireworks during Diwali due to their major role to the hazardous haze that covers the city as colder weather sets in.

Yet earlier this year, the recently formed regional leadership appealed to the supreme court to seek a modification of the ban.

They proposed allowing "eco-friendly fireworks" – previously questioned by environmentalists as being only roughly 30 percent less polluting – as a balance between "cultural practices and environment".

Court Ruling and Implementation

Despite concerns of medical and ecological activists, judges complied with the proposal, stipulating that environmentally conscious fireworks could be set off during designated periods throughout the Diwali.

On Monday night, there was extensive disregard of the designated hours across the metropolis, with minimal enforcement regarding whether the firecrackers being used were actually the eco-friendly type.

Many recording stations throughout the capital registered contamination reaching highest levels around late evening to the most severe readings seen during the festival in at least recent memory.

Cross-Border Consequences

Extensive ignition of firecrackers during Diwali also triggered a controversy with adjacent Pakistan, with officials in Pakistan's Punjab partly blaming worsening atmospheric conditions in their urban centers on contaminants traveling from neighboring India following the events.

Persistent Pollution Crisis

Extremely elevated concentrations of atmospheric toxins in the capital have remained as a serious challenge for over a decade and a half, with the condition showing no improvement.

During celebratory seasons, the levels of dangerous particulate matter in the environment has been found to spike to significantly exceeding the worst readings ever documented in China's capital, which was formerly considered as the planet's dirtiest city.

Multiple Contamination Factors

The problem in the capital is caused by a combination of different contributors including automobile exhaust, airborne particles, development work, garbage fires and pollutants from farm burning in adjacent states of farming communities.

Throughout these areas, agricultural workers regularly burn crop residue to expedite field preparation, creating dangerous haze that becomes contained over the metropolitan area as winter air sets in.

Medical and Economic Consequences

Public health and economic consequences on the roughly thirty-three million residents calling home the capital region is significant, according to multiple investigations.

These hazardous conditions causes high levels of nervous system, heart and circulatory and lung disorders, and can even lead to malignancies.

Environmental contamination is estimated to be accounting for 10,000 early deaths per year in the capital.