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Tuesday brought inhabitants of the planet's dirtiest urban center encountered breathing dangerously toxic air that was classified as the "severe" level.

Record-Breaking Pollution Readings

Several parts of the capital recorded an pollution measurement above 500, which translates to ten times the safe level set by the World Health Organization.

Certain monitoring stations, concentrations of PM2.5 and PM10 hit highs of 1800, representing fifteen to twenty times exceeding acceptable standards.

Firecracker Restrictions and New Developments

Since 2020, authorities had implemented a complete ban on the sale and use of firecrackers during celebrations due to their substantial impact to the deadly haze that blankets the city as winter approaches.

However in recent months, the current local leadership petitioned the supreme court to seek a relaxation of the restrictions.

They proposed allowing "environmentally conscious pyrotechnics" – historically questioned by environmentalists as being only about 30% lower impact – as a compromise between "tradition and public health".

Court Verdict and Implementation

Much to the frustration of medical and ecological campaigners, judicial authorities agreed to the appeal, specifying that green firecrackers could be set off during limited hours throughout the celebrations.

During the celebrations, there was considerable flouting of the designated hours across the city, with minimal regulation regarding whether the fireworks being used were actually the supposedly greener type.

Several air quality sensors throughout the capital registered pollution peaking around midnight to some of the worst levels observed during celebrations in at least three years.

Regional Consequences

Extensive ignition of pyrotechnics during Diwali also initiated a controversy with bordering the neighboring country, with authorities in Pakistani Punjab partially attributing deteriorating atmospheric conditions in Lahore on pollutants traveling from India following the events.

Long-Standing Environmental Crisis

The dangerously high levels of pollution in Delhi have continued as a major issue for more than 15 years, with the situation gradually deteriorating.

Around the festival period, the levels of toxic particulate matter in the air has been found to spike to significantly exceeding the worst records ever documented in Beijing, which was formerly regarded as the globally most contaminated metropolis.

Various Contamination Sources

The problem in the capital is attributed to a combination of various sources including heavy vehicle emissions, airborne particles, building projects, garbage fires and smoke from farm burning in neighbouring regions of farming communities.

Throughout these areas, farmers illegally ignite agricultural waste to prepare for next season, producing toxic haze that then gets trapped over the capital as colder air descends.

Public Health and Economic Consequences

The economic and health toll on the nearly 33 million people calling home the metropolitan zone is substantial, according to numerous investigations.

This pollution leads to elevated rates of neurological, heart and circulatory and lung conditions, and can even lead to malignancies.

Air quality crisis is estimated to be responsible for ten thousand premature deaths each year in the capital.