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Tuesday brought residents of the world's most polluted city found themselves exposed to severely hazardous air that registered in the "severe" level.

Alarming Air Quality Measurements

Several parts of Delhi recorded an AQI above 500, which translates to ten times the recommended threshold recommended by the WHO.

Certain monitoring stations, concentrations of PM2.5 and PM10 hit highs of 1,800, representing 15-20x above healthy limits.

Fireworks Prohibition and Recent Developments

Beginning in 2020, the government had maintained a total prohibition on the distribution and bursting of firecrackers during the Festival of Lights due to their significant contribution to the deadly pollution that covers the metropolis as winter sets in.

Yet recently, the recently formed local government approached the judicial authority to request a relaxation of the ban.

Officials advocated for allowing "environmentally conscious pyrotechnics" – historically questioned by environmental experts as being only approximately one-third lower impact – as a compromise between "tradition and ecological concerns".

Legal Verdict and Reality

Much to the frustration of public health and environmental campaigners, the court approved the request, specifying that environmentally conscious fireworks could be set off during specific hours throughout the festival.

During the celebrations, there was widespread flouting of the regulated periods across the metropolis, with insufficient regulation regarding whether the fireworks being used were actually the supposedly greener type.

Several monitoring devices throughout the city registered air quality spiking around the night hours to the most severe levels seen during the festival in at least recent memory.

International Consequences

The widespread use of pyrotechnics during the celebrations also sparked a dispute with bordering Pakistan, with authorities in Pakistani the Punjab region partly blaming deteriorating atmospheric conditions in Lahore on hazardous particles originating in across the border following the celebrations.

Chronic Environmental Crisis

Alarmingly severe concentrations of atmospheric toxins in the city have continued as a significant problem for fifteen-plus years, with the problem continuing to worsen.

Around celebratory seasons, the concentration of hazardous particulate matter in the atmosphere has been observed to increase dramatically to seventy percent above the peak records ever recorded in the Chinese city, which was previously considered as the planet's dirtiest metropolis.

Multiple Pollution Sources

This crisis in Delhi is resulting from a mix of various sources including automobile exhaust, airborne particles, development work, rubbish burning and smoke from crop residue ignition in neighbouring regions of farming communities.

Within these states, agricultural workers regularly ignite agricultural waste to expedite field preparation, producing dangerous haze that then gets trapped over the metropolitan area as winter air descends.

Medical and Economic Impact

Both financial and medical impact on the nearly 33 million people calling home the capital region is significant, according to various investigations.

The contaminated air results in elevated rates of nervous system, heart and circulatory and respiratory disorders, and can potentially cause oncological diseases.

The pollution is projected to be responsible for 10,000 premature deaths annually in Delhi.