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As Tuesday dawned citizens of the planet's dirtiest urban center were faced with inhaling extremely polluted air that was classified as the "severe" range.

Extremely High Pollution Levels

Various sections of Delhi showed an AQI over 500, which represents a tenfold increase over the safe level established by the WHO.

In some locations, readings of dangerous airborne particles hit highs of 1,800, representing 15-20x above acceptable levels.

Fireworks Prohibition and Current Developments

For the past four years, officials had enforced a complete ban on the distribution and bursting of firecrackers during Diwali due to their significant contribution to the dangerous pollution that covers the capital as colder weather sets in.

Nevertheless recently, the recently formed regional government approached the supreme court to request a modification of the restrictions.

Officials advocated for allowing "green crackers" – which have been criticized by environmental experts as being only roughly 30 percent lower impact – as a compromise between "cultural practices and environment".

Legal Ruling and Enforcement

Despite concerns of public health and environmental activists, judges agreed to the proposal, mandating that green firecrackers could be ignited during designated hours throughout the festival.

On Monday night, there was widespread flouting of the time restrictions across the city, with minimal regulation regarding whether the fireworks being used were actually the eco-friendly version.

Many recording stations throughout the city registered air quality reaching highest levels around midnight to the most severe readings observed during celebrations in at least recent memory.

Cross-Border Consequences

Extensive ignition of firecrackers during Diwali also sparked a dispute with bordering the neighboring country, with representatives in Pakistani Punjab province partially attributing deteriorating atmospheric conditions in the city of Lahore on pollutants traveling from India following the events.

Chronic Pollution Issue

Alarmingly severe concentrations of air contamination in Delhi have continued as a major problem for more than 15 years, with the situation gradually deteriorating.

Around celebratory seasons, the levels of hazardous airborne contaminants in the air has been documented to shoot up to significantly exceeding the worst levels ever recorded in China's capital, which was previously regarded as the planet's dirtiest urban center.

Various Pollution Factors

This crisis in Delhi is attributed to a convergence of different contributors including transportation pollution, construction debris, development work, waste incineration and smoke from crop residue ignition in neighbouring regions of farming communities.

Throughout these areas, farmers routinely set their fields on fire to prepare for next season, producing toxic haze that remains stagnant over the metropolitan area as winter air descends.

Public Health and Economic Consequences

The economic and health toll on the roughly thirty-three million people calling home the Delhi area is substantial, according to multiple investigations.

This pollution causes elevated rates of neurological, heart and circulatory and breathing disorders, and can result in malignancies.

Environmental contamination is estimated to be accounting for approximately 10k early fatalities annually in the city.