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Tuesday brought inhabitants of the world's most polluted city found themselves inhaling extremely polluted air that was classified as the "alarming" range.

Alarming Pollution Levels

Several parts of Delhi recorded an pollution measurement exceeding 500, which translates to a tenfold increase over the healthy level set by the World Health Organization.

Certain monitoring stations, readings of toxic particulate matter hit highs of eighteen hundred, amounting to 15-20x exceeding healthy levels.

Pyrotechnics Ban and New Developments

For the past four years, officials had enforced a comprehensive restriction on the distribution and bursting of firecrackers during Diwali due to their substantial impact to the hazardous smog that engulfs the metropolis as colder weather begins.

Yet recently, the recently formed local government appealed to the supreme court to seek a modification of the prohibition.

Officials advocated for allowing "green crackers" – previously doubted by environmental experts as being only roughly 30 percent less polluting – as a balance between "cultural practices and public health".

Court Verdict and Implementation

Despite concerns of medical and ecological advocates, judicial authorities approved the proposal, specifying that green firecrackers could be set off during specific time windows throughout the festival.

Throughout the festival evening, there was considerable disregard of the designated hours across the capital, with minimal monitoring regarding whether the fireworks being used were actually the eco-friendly version.

Numerous air quality sensors throughout Delhi registered pollution peaking around the night hours to the most severe levels recorded during Diwali in at least the past three years.

International Implications

Extensive ignition of fireworks during the celebrations also initiated a controversy with neighbouring the neighboring country, with representatives in Pakistan's Punjab partly blaming deteriorating air quality in Lahore on contaminants coming from neighboring India following the festivities.

Long-Standing Environmental Problem

The dangerously high concentrations of pollution in the city have remained as a serious problem for more than 15 years, with the situation gradually deteriorating.

Around Diwali, the levels of toxic particles in the air has been documented to shoot up to seventy percent above the worst levels ever documented in Beijing, which was previously regarded as the planet's dirtiest urban center.

Diverse Pollution Contributors

The problem in Delhi is resulting from a convergence of various sources including automobile exhaust, airborne particles, building projects, rubbish burning and pollutants from farm burning in neighbouring regions of Punjab and Haryana.

Within these states, agricultural workers routinely set their fields on fire to prepare for next season, generating hazardous smog that remains stagnant over the city as colder air descends.

Medical and Financial Impact

Both financial and medical toll on the approximately 33 million residents residing in the capital region is substantial, according to numerous investigations.

The contaminated air causes elevated rates of nervous system, heart and circulatory and lung conditions, and can even lead to oncological diseases.

Air quality crisis is estimated to be responsible for ten thousand premature fatalities per year in Delhi.