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As Tuesday dawned inhabitants of this heavily contaminated metropolis found themselves exposed to severely hazardous air that was classified as the "alarming" range.

Extremely High Pollution Measurements

Various sections of Delhi recorded an air quality index exceeding 500, which translates to 10x the safe limit established by the World Health Organization.

Certain monitoring stations, readings of toxic particulate matter hit highs of 1,800, representing fifteen to twenty times higher than healthy levels.

Firecracker Prohibition and Current Changes

For the past four years, officials had implemented a comprehensive restriction on the purchase and ignition of pyrotechnics during Diwali due to their major role to the dangerous smog that engulfs the metropolis as colder weather begins.

Nevertheless in recent months, the newly elected local administration approached the supreme court to propose a relaxation of the restrictions.

The suggestion was allowing "environmentally conscious pyrotechnics" – which have been questioned by environmentalists as being only about 30% lower impact – as a middle ground between "cultural practices and public health".

Judicial Verdict and Reality

Much to the frustration of public health and environmental activists, judges approved the proposal, mandating that green firecrackers could be set off during designated hours throughout the festival.

On Monday night, there was extensive disregard of the time restrictions across the capital, with minimal monitoring regarding whether the fireworks being used were actually the more environmentally friendly variety.

Many monitoring devices throughout Delhi showed pollution spiking around the night hours to some of the worst measurements observed during celebrations in at least the past three years.

Regional Implications

Extensive ignition of fireworks during the festival also initiated 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 traveling from neighboring India following the celebrations.

Persistent Environmental Crisis

Extremely elevated readings of pollution in Delhi have remained as a significant challenge for fifteen-plus years, with the condition showing no improvement.

During Diwali, the levels of toxic particulate matter in the environment has been found to shoot up to seventy percent above the most severe readings ever recorded in the Chinese city, which was once regarded as the world's most polluted metropolis.

Multiple Contamination Contributors

The situation in the capital is caused by a convergence of various sources including transportation pollution, construction debris, building projects, garbage fires and smoke from crop residue ignition in neighbouring regions of neighboring agricultural zones.

Throughout these areas, agricultural workers regularly set their fields on fire to prepare for next season, generating dangerous smog that then gets trapped over the capital as colder air sets in.

Public Health and Financial Consequences

Both financial and medical consequences on the roughly thirty-three million people calling home the capital region is enormous, according to multiple investigations.

This pollution causes increased incidence of neurological, heart and circulatory and lung disorders, and can result in oncological diseases.

The pollution is calculated to be causing ten thousand early fatalities per year in the capital.