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As Tuesday dawned residents of this heavily contaminated metropolis found themselves inhaling dangerously toxic air that was classified as the "alarming" range.

Alarming Air Quality Measurements

Several parts of Delhi recorded an pollution measurement over 500, which equals a tenfold increase over the healthy level set by the World Health Organization.

Certain monitoring stations, readings of PM2.5 and PM10 soared to of 1,800, amounting to fifteen to twenty times above healthy limits.

Pyrotechnics Restrictions and New Policy Shifts

Since 2020, the government had maintained a complete ban on the sale and use of firecrackers during celebrations due to their substantial impact to the deadly haze that blankets the capital as winter begins.

Yet recently, the current city leadership appealed to the highest court to request a relaxation of the ban.

Officials advocated for allowing "green crackers" – which have been doubted by environmentalists as being only about 30% less polluting – as a middle ground between "heritage and environment".

Legal Verdict and Reality

To the disappointment of environmental and health campaigners, judges approved the request, specifying that environmentally conscious fireworks could be used during specific periods throughout the Diwali.

During the celebrations, there was extensive violation of the time restrictions across the capital, with insufficient monitoring regarding whether the pyrotechnics being used were actually the supposedly greener type.

Numerous air quality sensors throughout Delhi recorded air quality spiking around late evening to some of the worst readings recorded during Diwali in at least recent memory.

Regional Consequences

The widespread use of fireworks during the festival also triggered a blame game with bordering Pakistan, with officials in Pakistani the Punjab region pointing to worsening air quality in the city of Lahore on contaminants coming from India following the events.

Long-Standing Environmental Problem

The dangerously high concentrations of atmospheric toxins in Delhi have remained as a major problem for fifteen-plus years, with the condition continuing to worsen.

Around Diwali, the amount of toxic airborne contaminants in the environment has been found to increase dramatically to seventy percent above the worst readings ever recorded in the Chinese city, which was formerly regarded as the planet's dirtiest city.

Diverse Contamination Sources

This crisis in the capital is resulting from a combination of different contributors including heavy vehicle emissions, construction debris, building projects, waste incineration and pollutants from agricultural fires in neighbouring states of farming communities.

Within these states, rural residents regularly burn crop residue to clear them quickly, producing hazardous pollution that then gets trapped over the capital as colder air sets in.

Public Health and Economic Impact

Both financial and medical consequences on the approximately 33 million people living in the metropolitan zone is significant, according to multiple research.

This pollution results in increased incidence of nervous system, cardiovascular and breathing diseases, and can even lead to cancer.

Air quality crisis is calculated to be responsible for ten thousand untimely fatalities annually in Delhi.