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Tuesday brought residents of the world's most polluted city found themselves exposed to severely hazardous air that was classified as the "alarming" level.

Alarming Pollution Levels

Various sections of the city showed an air quality index above 500, which equals ten times the safe threshold set by the WHO.

Certain monitoring stations, levels of dangerous airborne particles reached peaks of 1,800, amounting to 15 to 20 times higher than acceptable levels.

Firecracker Ban and Recent Developments

For the past four years, officials had enforced a total prohibition on the sale and use of fireworks during the Festival of Lights due to their substantial impact to the dangerous smog that blankets the city as colder weather approaches.

Yet recently, the newly elected city government petitioned the judicial authority to seek a easing of the ban.

Officials advocated for allowing "environmentally conscious pyrotechnics" – historically criticized by conservation groups as being only approximately one-third reduced emissions – as a compromise between "heritage and ecological concerns".

Legal Decision and Implementation

Despite concerns of public health and environmental campaigners, judicial authorities approved the proposal, specifying that environmentally conscious fireworks could be ignited during specific time windows throughout the celebrations.

Throughout the festival evening, there was widespread disregard of the regulated periods across the metropolis, with little monitoring regarding whether the firecrackers being used were actually the supposedly greener variety.

Numerous monitoring devices throughout Delhi registered pollution spiking around midnight to the most severe readings observed during celebrations in at least three years.

Cross-Border Consequences

The widespread use of pyrotechnics during the festival also initiated a dispute with neighbouring Pakistan, with representatives in Pakistan's the Punjab region partially attributing declining atmospheric conditions in the city of Lahore on hazardous particles traveling from India following the events.

Long-Standing Environmental Issue

The dangerously high levels of air contamination in Delhi have remained as a major problem for more than 15 years, with the situation showing no improvement.

Around celebratory seasons, the amount of toxic airborne contaminants in the environment has been observed to increase dramatically to significantly exceeding the peak levels ever recorded in Beijing, which was formerly viewed as the planet's dirtiest city.

Diverse Pollution Contributors

The situation in the city is resulting from a combination of different contributors including transportation pollution, construction debris, construction activities, rubbish burning and pollutants from crop residue ignition in adjacent areas of farming communities.

In these regions, agricultural workers routinely set their fields on fire to clear them quickly, generating dangerous smog that remains stagnant over the metropolitan area as winter air arrives.

Public Health and Economic Impact

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

This pollution causes elevated rates of nervous system, cardiovascular and respiratory diseases, and can potentially cause cancer.

Environmental contamination is calculated to be causing approximately 10k early deaths each year in the city.