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As Tuesday dawned inhabitants of the planet's dirtiest urban center encountered breathing dangerously toxic air that fell into the "alarming" category.

Extremely High Pollution Readings

Various sections of Delhi registered an AQI over 500, which equals 10x the healthy limit set by the global health authority.

In some locations, levels of dangerous airborne particles reached peaks of 1,800, representing 15-20x exceeding healthy levels.

Firecracker Prohibition and Recent Policy Shifts

Beginning in 2020, the government had implemented a comprehensive restriction on the distribution and bursting of pyrotechnics during the Festival of Lights due to their significant contribution to the deadly haze that engulfs the metropolis as winter sets in.

Nevertheless earlier this year, the current local government appealed to the supreme court to propose a modification of the restrictions.

The suggestion was allowing "environmentally conscious pyrotechnics" – historically criticized by conservation groups as being only approximately one-third lower impact – as a compromise between "tradition and environment".

Court Verdict and Reality

Despite concerns of public health and environmental activists, judges approved the proposal, mandating that green firecrackers could be ignited during limited periods throughout the celebrations.

During the celebrations, there was widespread disregard of the time restrictions across the city, with little regulation regarding whether the firecrackers being used were actually the eco-friendly version.

Many monitoring devices throughout the city recorded air quality reaching highest levels around the night hours to some of the worst readings seen during the festival in at least the past three years.

Regional Consequences

Extensive ignition of fireworks during Diwali also initiated a controversy with neighbouring the neighboring country, with authorities in Pakistani Punjab pointing to worsening atmospheric conditions in the city of Lahore on hazardous particles coming from across the border following the events.

Long-Standing Environmental Problem

Extremely elevated concentrations of air contamination in the capital have continued as a major challenge for over a decade and a half, with the condition showing no improvement.

During the festival period, the amount of dangerous particles in the air has been observed to spike to significantly exceeding the worst levels ever documented in Beijing, which was previously regarded as the planet's dirtiest urban center.

Diverse Pollution Factors

This crisis in Delhi is attributed to a combination of different contributors including transportation pollution, airborne particles, building projects, waste incineration and smoke from crop residue ignition in adjacent areas of Punjab and Haryana.

Throughout these areas, rural residents routinely set their fields on fire to expedite field preparation, creating hazardous pollution that becomes contained over the capital as colder air sets in.

Health and Financial Toll

The economic and health impact on the roughly thirty-three million inhabitants calling home the capital region is significant, according to multiple investigations.

This pollution results in elevated rates of nervous system, heart and circulatory and breathing conditions, and can potentially cause cancer.

Air quality crisis is projected to be causing approximately 10k early mortalities each year in the capital.