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On Tuesday morning residents of this heavily contaminated metropolis were faced with exposed to severely hazardous air that registered in the "critical" category.

Record-Breaking Pollution Measurements

Several parts of the city showed an AQI above 500, which equals ten times the safe limit established by the World Health Organization.

Particular areas, levels of PM2.5 and PM10 reached peaks of eighteen hundred, representing 15 to 20 times above acceptable standards.

Firecracker Prohibition and Recent Changes

Beginning in 2020, officials had maintained a comprehensive restriction on the distribution and bursting of pyrotechnics during the Festival of Lights due to their major role to the hazardous haze that covers the metropolis as colder weather approaches.

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

They proposed allowing "environmentally conscious pyrotechnics" – previously questioned by environmentalists as being only roughly 30 percent reduced emissions – as a compromise between "cultural practices and ecological concerns".

Legal Decision and Reality

Much to the frustration of environmental and health activists, judges agreed to the request, mandating that eco-friendly pyrotechnics could be set off during specific time windows throughout the festival.

Throughout the festival evening, there was extensive disregard of the designated hours across the city, with minimal regulation regarding whether the fireworks being used were actually the eco-friendly version.

Several air quality sensors throughout Delhi registered pollution peaking around late evening to the most severe measurements observed during Diwali in at least the past three years.

Regional Consequences

The widespread use of pyrotechnics during Diwali also triggered a dispute with neighbouring the neighboring country, with representatives in Pakistan's Punjab partly blaming deteriorating atmospheric conditions in Lahore on contaminants coming from across the border following the festivities.

Persistent Pollution Crisis

Extremely elevated concentrations of air contamination in the capital have remained as a significant challenge for more than 15 years, with the problem showing no improvement.

Around Diwali, the concentration of dangerous airborne contaminants in the air has been found to shoot up to seventy percent above the worst records ever documented in China's capital, which was once viewed as the globally most contaminated urban center.

Multiple Contamination Sources

The problem in the city is attributed to a combination of multiple factors including heavy vehicle emissions, dust, building projects, waste incineration and haze from crop residue ignition in nearby areas of neighboring agricultural zones.

In these regions, agricultural workers illegally burn crop residue to prepare for next season, creating dangerous pollution that remains stagnant over the metropolitan area as winter air arrives.

Medical and Financial Impact

Both financial and medical impact on the roughly thirty-three million inhabitants living in the Delhi area is enormous, according to various studies.

This pollution leads to high levels of neurological, cardiovascular and breathing diseases, and can even lead to cancer.

The pollution is calculated to be causing 10,000 untimely mortalities per year in Delhi.