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As Tuesday dawned citizens of the world's most polluted city were faced with breathing dangerously toxic air that fell into the "alarming" category.

Alarming Pollution Levels

Several parts of Delhi registered an air quality index over 500, which equals ten times the healthy threshold established by the global health authority.

Particular areas, readings of PM2.5 and PM10 hit highs of eighteen hundred, representing 15 to 20 times above healthy limits.

Fireworks Restrictions and Current Developments

Beginning in 2020, the government had implemented a complete ban on the distribution and bursting of fireworks during Diwali due to their significant contribution to the deadly haze that blankets the metropolis as colder weather begins.

However in recent months, the current city administration approached the supreme court to request a modification of the prohibition.

Officials advocated for allowing "green crackers" – historically criticized by environmentalists as being only roughly 30 percent less polluting – as a balance between "tradition and public health".

Legal Decision and Implementation

Much to the frustration of environmental and health campaigners, the court complied with the appeal, mandating that green firecrackers could be set off during designated time windows throughout the celebrations.

On Monday night, there was extensive flouting of the time restrictions across the city, with little regulation regarding whether the pyrotechnics being used were actually the supposedly greener type.

Many air quality sensors throughout Delhi registered pollution peaking around midnight to some of the worst levels seen during Diwali in at least three years.

International Effects

The widespread use of fireworks during the festival also sparked a dispute with bordering Pakistan, with representatives in Pakistani the Punjab region pointing to deteriorating air quality in their urban centers on hazardous particles coming from across the border following the events.

Persistent Environmental Issue

Alarmingly severe levels of air contamination in Delhi have persisted as a significant problem for more than 15 years, with the problem gradually deteriorating.

Near the festival period, the amount of toxic particles in the air has been documented to increase dramatically to seventy percent above the most severe records ever documented in China's capital, which was formerly considered as the world's most polluted city.

Multiple Contamination Contributors

This crisis in the capital is resulting from a mix of various sources including transportation pollution, dust, development work, garbage fires and haze from farm burning in neighbouring states of farming communities.

Within these states, rural residents illegally ignite agricultural waste to expedite field preparation, creating toxic pollution that becomes contained over the city as winter air descends.

Health and Financial Impact

Public health and economic toll on the approximately 33 million residents calling home the metropolitan zone is enormous, according to multiple research.

This pollution leads to elevated rates of nervous system, heart and circulatory and lung disorders, and can potentially cause cancer.

The pollution is estimated to be responsible for approximately 10k early deaths annually in Delhi.