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On Tuesday morning inhabitants of the world's most polluted city found themselves breathing extremely polluted air that fell into the "alarming" level.

Extremely High Air Quality Levels

Various sections of the capital registered an AQI exceeding 500, which translates to ten times the recommended level established by the global health authority.

Certain monitoring stations, readings of dangerous airborne particles soared to of 1800, representing fifteen to twenty times higher than safe standards.

Firecracker Restrictions and Current Changes

Since 2020, officials had maintained a comprehensive restriction on the sale and use of firecrackers during celebrations due to their significant contribution to the deadly pollution that covers the metropolis as winter sets in.

Yet earlier this year, the recently formed city leadership appealed to the highest court to request a modification of the ban.

Officials advocated for allowing "environmentally conscious pyrotechnics" – historically doubted by conservation groups as being only roughly 30 percent lower impact – as a balance between "tradition and environment".

Legal Verdict and Implementation

Much to the frustration of medical and ecological activists, judicial authorities complied with the appeal, stipulating that green firecrackers could be used during specific hours throughout the festival.

On Monday night, there was widespread flouting of the regulated periods across the capital, with minimal enforcement regarding whether the pyrotechnics being used were actually the more environmentally friendly version.

Several monitoring devices throughout the city showed pollution reaching highest levels around midnight to the most severe readings recorded during celebrations in at least three years.

Cross-Border Implications

The proliferation of firecrackers during the celebrations also sparked a dispute with bordering Pakistan, with officials in Pakistan's Punjab partly blaming deteriorating air quality in the city of Lahore on hazardous particles coming from neighboring India following the events.

Persistent Pollution Issue

Alarmingly severe levels of air contamination in the city have persisted as a serious issue for over a decade and a half, with the condition gradually deteriorating.

Around celebratory seasons, the concentration of dangerous particulate matter in the atmosphere has been documented to shoot up to significantly exceeding the worst readings ever documented in the Chinese city, which was formerly viewed as the planet's dirtiest urban center.

Various Pollution Factors

The situation in the city is attributed to a combination of multiple factors including heavy vehicle emissions, construction debris, development work, waste incineration and pollutants from farm burning in nearby regions of farming communities.

Within these states, agricultural workers routinely burn crop residue to clear them quickly, creating hazardous haze that becomes contained over the metropolitan area as winter air descends.

Medical and Economic Impact

The economic and health toll on the nearly 33 million people residing in the metropolitan zone is substantial, according to various investigations.

This pollution results in increased incidence of nervous system, heart and circulatory and respiratory conditions, and can even lead to cancer.

The pollution is estimated to be responsible for approximately 10k premature fatalities annually in Delhi.