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On Tuesday morning inhabitants of the world's most polluted city found themselves breathing dangerously toxic air that fell into the "critical" range.

Alarming Air Quality Levels

Several parts of the capital recorded an pollution measurement over 500, which translates to ten times the safe threshold established by the global health authority.

Certain monitoring stations, readings of toxic particulate matter hit highs of 1800, amounting to fifteen to twenty times higher than healthy levels.

Pyrotechnics Restrictions and Recent Policy Shifts

Since 2020, authorities had enforced a comprehensive restriction on the sale and use of firecrackers during Diwali due to their substantial impact to the dangerous smog that blankets the capital as the cold season sets in.

Yet earlier this year, the current regional leadership appealed to the judicial authority to propose a easing of the restrictions.

The suggestion was allowing "eco-friendly fireworks" – previously questioned by environmentalists as being only approximately one-third less polluting – as a balance between "tradition and public health".

Judicial Decision and Enforcement

To the disappointment of environmental and health campaigners, judges agreed to the request, specifying that green firecrackers could be used during designated periods throughout the celebrations.

On Monday night, there was widespread flouting of the time restrictions across the capital, with little regulation regarding whether the fireworks being used were actually the more environmentally friendly type.

Several air quality sensors throughout the capital recorded air quality reaching highest levels around midnight to some of the worst measurements recorded during celebrations in at least the past three years.

International Implications

The proliferation of pyrotechnics during the festival also sparked a dispute with bordering the neighboring country, with officials in Pakistan's Punjab province partly blaming deteriorating air quality in Lahore on contaminants traveling from across the border following the festivities.

Chronic Environmental Crisis

Extremely elevated levels of atmospheric toxins in the city have persisted as a significant issue for fifteen-plus years, with the condition gradually deteriorating.

Near the festival period, the amount of toxic airborne contaminants in the atmosphere has been observed to spike to 70% higher the peak records ever recorded in China's capital, which was once considered as the world's most polluted city.

Diverse Pollution Factors

This crisis in the city is attributed to a combination of multiple factors including heavy vehicle emissions, airborne particles, building projects, waste incineration and haze from agricultural fires in adjacent areas of neighboring agricultural zones.

In these regions, rural residents regularly burn crop residue to clear them quickly, creating hazardous pollution that then gets trapped over the metropolitan area as colder air descends.

Health and Financial Toll

Both financial and medical consequences on the approximately 33 million inhabitants living in the capital region is substantial, according to multiple research.

This pollution results in increased incidence of neurological, cardiovascular and lung diseases, and can potentially cause cancer.

Environmental contamination is calculated to be causing approximately 10k untimely fatalities per year in the capital.