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As Tuesday dawned citizens of the planet's dirtiest urban center encountered breathing severely hazardous air that fell into the "critical" level.

Alarming Air Quality Readings

Multiple areas of the capital recorded an AQI exceeding 500, which translates to a tenfold increase over the safe threshold established by the global health authority.

In some locations, levels of PM2.5 and PM10 hit highs of 1800, equating to 15-20x higher than acceptable limits.

Firecracker Ban and New Policy Shifts

Since 2020, the government had maintained a comprehensive restriction on the purchase and ignition of fireworks during celebrations due to their major role to the hazardous smog that covers the city as winter begins.

Nevertheless recently, the recently formed city administration approached the supreme court to propose a modification of the ban.

They proposed allowing "environmentally conscious pyrotechnics" – historically criticized by conservation groups as being only roughly 30 percent lower impact – as a balance between "heritage and environment".

Court Decision and Reality

Much to the frustration of environmental and health advocates, judges agreed to the request, specifying that green firecrackers could be used during designated time windows throughout the celebrations.

Throughout the festival evening, there was widespread flouting of the designated hours across the city, with insufficient enforcement regarding whether the fireworks being used were actually the supposedly greener type.

Numerous air quality sensors throughout Delhi registered pollution spiking around midnight to some of the worst measurements recorded during the festival in at least three years.

International Implications

The proliferation of pyrotechnics during the festival also sparked a controversy with neighbouring the neighboring country, with representatives in Pakistan's Punjab province pointing to deteriorating pollution levels in the city of Lahore on contaminants coming from neighboring India following the festivities.

Chronic Pollution Crisis

Alarmingly severe levels of air contamination in the capital have remained as a major problem for over a decade and a half, with the problem showing no improvement.

During Diwali, the amount of dangerous airborne contaminants in the environment has been documented to spike to seventy percent above the peak levels ever recorded in China's capital, which was previously regarded as the planet's dirtiest city.

Various Pollution Factors

This crisis in the city is attributed to a combination of multiple factors including transportation pollution, airborne particles, construction activities, waste incineration and haze from farm burning in nearby areas of Punjab and Haryana.

Throughout these areas, agricultural workers illegally set their fields on fire to prepare for next season, creating toxic pollution that becomes contained over the capital as winter air sets in.

Medical and Economic Consequences

Public health and economic impact on the nearly 33 million inhabitants living in the Delhi area is enormous, according to numerous investigations.

These hazardous conditions leads to high levels of nervous system, cardiovascular and respiratory diseases, and can result in cancer.

Environmental contamination is projected to be accounting for approximately 10k premature mortalities annually in Delhi.