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Tuesday brought inhabitants of this heavily contaminated metropolis were faced with breathing severely hazardous air that was classified as the "critical" level.

Record-Breaking Air Quality Readings

Various sections of Delhi recorded an pollution measurement exceeding 500, which equals a tenfold increase over the safe limit set by the WHO.

Certain monitoring stations, readings of dangerous airborne particles reached peaks of 1,800, equating to 15 to 20 times higher than acceptable levels.

Fireworks Prohibition and Recent Developments

Beginning in 2020, officials had enforced a complete ban on the sale and use of firecrackers during Diwali due to their major role to the deadly pollution that blankets the capital as the cold season begins.

However earlier this year, the newly elected regional leadership approached the highest court to propose a easing of the prohibition.

They proposed allowing "eco-friendly fireworks" – previously criticized by conservation groups as being only roughly 30 percent less polluting – as a balance between "heritage and public health".

Court Decision and Implementation

To the disappointment of environmental and health campaigners, the court complied with the appeal, mandating that environmentally conscious fireworks could be set off during limited time windows throughout the celebrations.

On Monday night, there was extensive disregard of the designated hours across the metropolis, with minimal regulation regarding whether the pyrotechnics being used were actually the eco-friendly type.

Several monitoring devices throughout the city registered pollution spiking around late evening to the most severe readings recorded during Diwali in at least three years.

Cross-Border Effects

The proliferation of firecrackers during the festival also sparked a blame game with adjacent the neighboring country, with representatives in Pakistani Punjab province partly blaming deteriorating atmospheric conditions in the city of Lahore on pollutants coming from India following the celebrations.

Long-Standing Environmental Issue

Alarmingly severe levels of air contamination in the city have persisted as a significant problem for over a decade and a half, with the condition continuing to worsen.

Around the festival period, the amount of hazardous particulate matter in the atmosphere has been observed to increase dramatically to significantly exceeding the worst levels ever recorded in Beijing, which was formerly regarded as the globally most contaminated metropolis.

Diverse Contamination Contributors

This crisis in the city is caused by a combination of various sources including heavy vehicle emissions, dust, building projects, waste incineration and pollutants from farm burning in neighbouring areas of Punjab and Haryana.

Within these states, rural residents regularly burn crop residue to prepare for next season, generating hazardous smog that then gets trapped over the capital as colder air descends.

Medical and Economic Impact

Both financial and medical impact on the nearly 33 million residents calling home the Delhi area is enormous, according to numerous studies.

These hazardous conditions causes high levels of neurological, cardiovascular and respiratory diseases, and can potentially cause malignancies.

The pollution is calculated to be responsible for ten thousand untimely mortalities each year in Delhi.