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As Tuesday dawned inhabitants of the planet's dirtiest urban center encountered inhaling dangerously toxic air that was classified as the "alarming" category.

Record-Breaking Air Quality Readings

Multiple areas of the city recorded an AQI over 500, which represents 10x the recommended threshold established by the WHO.

Particular areas, concentrations of dangerous airborne particles soared to of eighteen hundred, equating to 15 to 20 times higher than healthy levels.

Fireworks Ban and New Developments

For the past four years, officials had maintained a total prohibition on the sale and use of firecrackers during Diwali due to their significant contribution to the hazardous smog that engulfs the metropolis as the cold season sets in.

Nevertheless earlier this year, the newly elected regional administration petitioned the supreme court to request a modification of the restrictions.

They proposed allowing "eco-friendly fireworks" – which have been doubted by environmental experts as being only about 30% less polluting – as a balance between "cultural practices and environment".

Legal Ruling and Reality

Much to the frustration of environmental and health campaigners, judicial authorities approved the appeal, stipulating that eco-friendly pyrotechnics could be used during specific hours throughout the Diwali.

On Monday night, there was extensive flouting of the time restrictions across the capital, with insufficient enforcement regarding whether the pyrotechnics being used were actually the eco-friendly type.

Many monitoring devices throughout the capital registered contamination spiking around midnight to extremely hazardous readings observed during the festival in at least recent memory.

Regional Implications

The widespread use of pyrotechnics during Diwali also initiated a dispute with bordering the neighboring country, with representatives in Pakistani the Punjab region pointing to worsening atmospheric conditions in Lahore on pollutants originating in neighboring India following the festivities.

Persistent Pollution Issue

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

During celebratory seasons, the amount of toxic airborne contaminants in the environment has been observed to shoot up to seventy percent above the peak levels ever documented in China's capital, which was formerly viewed as the world's most polluted metropolis.

Various Pollution Factors

The problem in the capital is attributed to a mix of various sources including automobile exhaust, construction debris, building projects, rubbish burning and smoke from crop residue ignition in neighbouring states of Punjab and Haryana.

In these regions, agricultural workers routinely set their fields on fire to expedite field preparation, generating toxic smog that then gets trapped over the capital as colder air sets in.

Medical and Economic Consequences

Both financial and medical impact on the nearly 33 million people residing in the capital region is enormous, according to numerous studies.

This pollution leads to high levels of neurological, cardiovascular and breathing diseases, and can result in cancer.

The pollution is projected to be causing approximately 10k premature mortalities annually in Delhi.