Tuesday brought inhabitants of the world's most polluted city found themselves breathing dangerously toxic air that fell into the "alarming" category.
Several parts of Delhi registered an pollution measurement above 500, which represents a tenfold increase over the recommended level established by the WHO.
Certain monitoring stations, concentrations of toxic particulate matter reached peaks of 1800, equating to 15-20x exceeding acceptable standards.
For the past four years, authorities had maintained a comprehensive restriction on the sale and use of firecrackers during celebrations due to their major role to the deadly haze that blankets the capital as winter approaches.
Yet in recent months, the current regional administration appealed to the highest court to request a modification of the prohibition.
Officials advocated for allowing "eco-friendly fireworks" – historically criticized by environmentalists as being only about 30% less polluting – as a compromise between "heritage and environment".
To the disappointment of medical and ecological activists, the court complied with the appeal, stipulating that eco-friendly pyrotechnics could be used during designated hours throughout the Diwali.
Throughout the festival evening, there was extensive flouting of the regulated periods across the metropolis, with minimal monitoring regarding whether the firecrackers being used were actually the eco-friendly type.
Several air quality sensors throughout the city registered pollution peaking around the night hours to the most severe readings recorded during the festival in at least three years.
The proliferation of fireworks during the celebrations also sparked a dispute with neighbouring Pakistan, with representatives in Pakistani Punjab pointing to declining air quality in their urban centers on hazardous particles traveling from neighboring India following the events.
The dangerously high concentrations of pollution in the capital have continued as a significant problem for over a decade and a half, with the situation continuing to worsen.
Around Diwali, the concentration of hazardous particles in the air has been found to shoot up to 70% higher the worst readings ever measured in Beijing, which was previously viewed as the planet's dirtiest urban center.
The situation in Delhi is attributed to a convergence of various sources including transportation pollution, construction debris, development work, waste incineration and smoke from crop residue ignition in neighbouring areas of neighboring agricultural zones.
In these regions, farmers illegally set their fields on fire to clear them quickly, creating dangerous pollution that becomes contained over the capital as winter air arrives.
Public health and economic toll on the nearly 33 million inhabitants calling home the capital region is significant, according to numerous research.
The contaminated air causes increased incidence of neurological, heart and circulatory and breathing disorders, and can result in cancer.
The pollution is estimated to be accounting for 10,000 untimely mortalities annually in the city.
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Susan Vega
Susan Vega
Susan Vega