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Tuesday brought residents of the world's most polluted city were faced with exposed to dangerously toxic air that registered in the "critical" range.

Record-Breaking Pollution Levels

Various sections of the city recorded an pollution measurement exceeding 500, which equals 10x the safe level established by the WHO.

In some locations, concentrations of PM2.5 and PM10 soared to of 1,800, amounting to 15 to 20 times above safe limits.

Firecracker Restrictions and Current Policy Shifts

Beginning in 2020, officials had maintained a comprehensive restriction on the sale and use of pyrotechnics during Diwali due to their major role to the hazardous smog that covers the metropolis as colder weather sets in.

Yet recently, the current regional government appealed to the judicial authority to request a relaxation of the ban.

The suggestion was allowing "environmentally conscious pyrotechnics" – previously criticized by environmentalists as being only approximately one-third less polluting – as a compromise between "cultural practices and ecological concerns".

Legal Decision and Implementation

Much to the frustration of public health and environmental campaigners, judicial authorities agreed to the appeal, mandating that green firecrackers could be used during limited hours throughout the celebrations.

Throughout the festival evening, there was extensive violation of the regulated periods across the capital, with little regulation regarding whether the fireworks being used were actually the eco-friendly variety.

Many monitoring devices throughout the city recorded pollution peaking around midnight to extremely hazardous readings seen during Diwali in at least three years.

Cross-Border Consequences

The widespread use of fireworks during the celebrations also sparked a dispute with adjacent the neighboring country, with officials in Pakistani the Punjab region pointing to deteriorating air quality in Lahore on hazardous particles coming from across the border following the festivities.

Long-Standing Pollution Crisis

The dangerously high readings of atmospheric toxins in Delhi have persisted as a serious problem for more than 15 years, with the condition continuing to worsen.

Around Diwali, the concentration of hazardous particulate matter in the air has been found to increase dramatically to 70% higher the peak records ever documented in the Chinese city, which was once regarded as the world's most polluted metropolis.

Various Contamination Sources

The problem in Delhi is caused by a convergence of various sources including heavy vehicle emissions, dust, building projects, waste incineration and pollutants from farm burning in adjacent states of neighboring agricultural zones.

Within these states, farmers illegally set their fields on fire to prepare for next season, creating hazardous haze that becomes contained over the metropolitan area as colder air sets in.

Medical and Economic Toll

The economic and health toll on the nearly 33 million residents residing in the Delhi area is enormous, according to various investigations.

The contaminated air results in elevated rates of neurological, cardiovascular and lung diseases, and can even lead to oncological diseases.

Environmental contamination is estimated to be causing approximately 10k untimely deaths annually in Delhi.