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As Tuesday dawned residents of this heavily contaminated metropolis were faced with breathing severely hazardous air that fell into the "alarming" level.

Extremely High Pollution Measurements

Multiple areas of the capital showed an pollution measurement exceeding 500, which equals a tenfold increase over the recommended limit set by the WHO.

Certain monitoring stations, concentrations of dangerous airborne particles soared to of 1800, equating to 15-20x higher than healthy limits.

Fireworks Ban and New Developments

Beginning in 2020, officials had enforced a comprehensive restriction on the sale and use of firecrackers during Diwali due to their major role to the dangerous smog that covers the capital as winter sets in.

Nevertheless recently, the recently formed regional administration appealed to the judicial authority to request a modification of the ban.

The suggestion was allowing "environmentally conscious pyrotechnics" – historically criticized by environmentalists as being only roughly 30 percent reduced emissions – as a balance between "tradition and ecological concerns".

Court Decision and Implementation

Despite concerns of public health and environmental campaigners, judges approved the appeal, mandating that environmentally conscious fireworks could be ignited during designated time windows throughout the festival.

On Monday night, there was extensive disregard of the regulated periods across the capital, with little regulation regarding whether the firecrackers being used were actually the supposedly greener variety.

Several air quality sensors throughout the city showed air quality peaking around late evening to extremely hazardous readings recorded during celebrations in at least the past three years.

International Consequences

The proliferation of fireworks during the festival also triggered a controversy with bordering the neighboring country, with officials in Pakistan's the Punjab region partly blaming worsening air quality in their urban centers on pollutants originating in India following the events.

Persistent Environmental Crisis

Alarmingly severe levels of pollution in the city have continued as a major challenge for over a decade and a half, with the condition showing no improvement.

During the festival period, the amount of dangerous particulate matter in the atmosphere has been documented to increase dramatically to significantly exceeding the peak records ever measured in the Chinese city, which was previously considered as the globally most contaminated metropolis.

Diverse Pollution Factors

The situation in Delhi is caused by a convergence of multiple factors including automobile exhaust, airborne particles, building projects, waste incineration and haze from crop residue ignition in neighbouring areas of farming communities.

Within these states, agricultural workers routinely ignite agricultural waste to prepare for next season, generating toxic smog that then gets trapped over the capital as colder air sets in.

Medical and Economic Impact

The economic and health toll on the nearly 33 million inhabitants living in the metropolitan zone is significant, according to numerous research.

This pollution causes high levels of neurological, heart and circulatory and lung diseases, and can potentially cause malignancies.

Air quality crisis is estimated to be causing ten thousand early mortalities annually in Delhi.