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As Tuesday dawned residents of the planet's dirtiest urban center found themselves breathing dangerously toxic air that was classified as the "critical" category.

Extremely High Air Quality Measurements

Several parts of the capital registered an AQI over 500, which equals a tenfold increase over the recommended level set by the WHO.

In some locations, levels of PM2.5 and PM10 soared to of 1,800, equating to 15-20x above safe standards.

Pyrotechnics Restrictions and New Policy Shifts

Since 2020, authorities had maintained a comprehensive restriction on the purchase and ignition of fireworks during celebrations due to their major role to the deadly haze that blankets the capital as winter sets in.

Nevertheless in recent months, the current local government petitioned the judicial authority to seek a modification of the prohibition.

The suggestion was allowing "environmentally conscious pyrotechnics" – previously criticized by conservation groups as being only approximately one-third reduced emissions – as a balance between "cultural practices and public health".

Legal Decision and Reality

Much to the frustration of public health and environmental campaigners, the court agreed to the proposal, stipulating that environmentally conscious fireworks could be set off during designated periods throughout the Diwali.

Throughout the festival evening, there was widespread violation of the designated hours across the capital, with little monitoring regarding whether the pyrotechnics being used were actually the supposedly greener type.

Numerous monitoring devices throughout the capital showed pollution peaking around the night hours to some of the worst readings observed during the festival in at least recent memory.

Regional Effects

The proliferation of fireworks during Diwali also initiated a blame game with adjacent Pakistan, with representatives in Pakistan's the Punjab region partly blaming declining pollution levels in their urban centers on contaminants originating in across the border following the celebrations.

Persistent Environmental Crisis

The dangerously high readings of atmospheric toxins in Delhi have continued as a major challenge for more than 15 years, with the condition gradually deteriorating.

Around celebratory seasons, the amount of dangerous airborne contaminants in the environment has been observed to shoot up to significantly exceeding the peak levels ever recorded in the Chinese city, which was previously considered as the planet's dirtiest metropolis.

Multiple Pollution Contributors

This crisis in Delhi is attributed to a combination of different contributors including automobile exhaust, dust, building projects, rubbish burning and pollutants from agricultural fires in nearby regions of farming communities.

Within these states, rural residents routinely ignite agricultural waste to clear them quickly, generating dangerous pollution that then gets trapped over the city as colder air arrives.

Medical and Financial Impact

The economic and health toll on the nearly 33 million inhabitants residing in the Delhi area is significant, according to numerous research.

These hazardous conditions leads to high levels of neurological, heart and circulatory and respiratory disorders, and can even lead to oncological diseases.

Environmental contamination is calculated to be accounting for approximately 10k early deaths per year in Delhi.