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Tuesday brought citizens of the world's most polluted city encountered exposed to dangerously toxic air that fell into the "alarming" level.

Alarming Pollution Levels

Several parts of the capital registered an air quality index exceeding 500, which translates to a tenfold increase over the recommended threshold recommended by the WHO.

In some locations, levels of toxic particulate matter reached peaks of eighteen hundred, equating to fifteen to twenty times higher than healthy levels.

Firecracker Restrictions and Current Developments

Beginning in 2020, the government had maintained a comprehensive restriction on the distribution and bursting of firecrackers during the Festival of Lights due to their significant contribution to the deadly pollution that engulfs the metropolis as colder weather sets in.

Nevertheless in recent months, the newly elected city administration petitioned the highest court to seek a modification of the restrictions.

They proposed allowing "eco-friendly fireworks" – which have been criticized by environmentalists as being only roughly 30 percent lower impact – as a compromise between "cultural practices and ecological concerns".

Legal Verdict and Reality

To the disappointment of public health and environmental activists, judicial authorities agreed to the request, stipulating that eco-friendly pyrotechnics could be used during limited time windows throughout the festival.

On Monday night, there was extensive flouting of the regulated periods across the city, with little regulation regarding whether the firecrackers being used were actually the eco-friendly variety.

Several monitoring devices throughout the capital registered air quality peaking around late evening to the most severe measurements observed during Diwali in at least recent memory.

International Implications

The widespread use of firecrackers during the celebrations also triggered a controversy with bordering Pakistan, with representatives in Pakistan's Punjab province pointing to declining pollution levels in their urban centers on contaminants originating in across the border following the festivities.

Long-Standing Pollution Issue

The dangerously high levels of pollution in the city have remained as a serious problem for fifteen-plus years, with the situation continuing to worsen.

Around Diwali, the concentration of toxic airborne contaminants in the air has been found to spike to 70% higher the worst records ever measured in Beijing, which was previously regarded as the planet's dirtiest city.

Multiple Pollution Sources

The situation in Delhi is caused by a convergence of different contributors including heavy vehicle emissions, construction debris, building projects, waste incineration and haze from crop residue ignition in neighbouring areas of neighboring agricultural zones.

In these regions, agricultural workers routinely set their fields on fire to clear them quickly, generating toxic haze that becomes contained over the city as cooler air descends.

Medical and Financial Consequences

The economic and health toll on the nearly 33 million residents residing in the capital region is enormous, according to numerous studies.

These hazardous conditions results in high levels of nervous system, cardiovascular and respiratory diseases, and can even lead to malignancies.

The pollution is estimated to be accounting for approximately 10k early deaths each year in the city.