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On Tuesday morning citizens of the planet's dirtiest urban center found themselves exposed to severely hazardous air that fell into the "critical" range.

Alarming Pollution Readings

Several parts of the city showed an AQI over 500, which equals 10x the healthy limit recommended by the World Health Organization.

Particular areas, concentrations of dangerous airborne particles reached peaks of 1,800, representing fifteen to twenty times higher than healthy limits.

Pyrotechnics Ban and Recent Policy Shifts

Since 2020, officials had enforced a comprehensive restriction on the sale and use of fireworks during Diwali due to their substantial impact to the deadly smog that blankets the metropolis as colder weather approaches.

Yet recently, the newly elected city leadership appealed to the judicial authority to request a relaxation of the ban.

The suggestion was allowing "green crackers" – historically doubted by conservation groups as being only approximately one-third reduced emissions – as a compromise between "cultural practices and environment".

Legal Decision and Enforcement

Much to the frustration of public health and environmental activists, judicial authorities complied with the request, stipulating that environmentally conscious fireworks could be set off during specific time windows throughout the Diwali.

Throughout the festival evening, there was considerable violation of the regulated periods across the metropolis, with insufficient enforcement regarding whether the fireworks being used were actually the supposedly greener variety.

Numerous recording stations throughout the city showed contamination peaking around midnight to the most severe readings observed during celebrations in at least recent memory.

Regional Implications

Extensive ignition of pyrotechnics during the celebrations also initiated a controversy with neighbouring Pakistan, with authorities in Pakistani Punjab province pointing to declining pollution levels in their urban centers on pollutants traveling from across the border following the celebrations.

Chronic Environmental Crisis

Extremely elevated levels of air contamination in the capital have remained as a major challenge for over a decade and a half, with the problem gradually deteriorating.

Near Diwali, the concentration of toxic particulate matter in the environment has been documented to increase dramatically to significantly exceeding the most severe records ever measured in China's capital, which was formerly regarded as the globally most contaminated urban center.

Diverse Pollution Sources

The situation in Delhi is attributed to a combination of different contributors including heavy vehicle emissions, dust, development work, garbage fires and pollutants from farm burning in neighbouring regions of farming communities.

Throughout these areas, farmers illegally burn crop residue to expedite field preparation, generating hazardous haze that then gets trapped over the city as colder air arrives.

Health and Financial Consequences

Both financial and medical consequences on the nearly 33 million inhabitants residing in the metropolitan zone is significant, according to numerous research.

The contaminated air leads to increased incidence of nervous system, cardiovascular and respiratory diseases, and can even lead to cancer.

Environmental contamination is projected to be responsible for ten thousand early mortalities per year in Delhi.