Kathmandu, April 8 -- A Swiss firm, IQAir, has ranked Kathmandu as the most polluted city in the world on Tuesday.

As per their website, the city of Kathmandu recorded an AQI of 279, which comes in the range of "very unhealthy".

According to IQAir, It recorded PM 2.5 at 204.5 ug/m3and PM10 at 233.5 ug/m3.

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As per IQAir, "PM2.5 concentration is currently 40.9 times the World Health Organization annual PM2.5 guideline value."

The depleting air quality has spiked respiratory difficulty cases at major government hospitals in the valley.

The Tribhuvan University Teaching Hospital (TUTH), one of the largest government-run multidisciplinary hospitals, has seen a spike...