<div style="text-align: justify; "><span style="font-size: 1rem;"><b>Air pollution still remains one of the top-most challenges for Bangladesh and Dhaka was ranked as the fourth most polluted city in the world with ‘unhealthy’ air quality on Wednesday (November 30, 2022) morning.</b></span><br></div><div style="text-align: justify;"><br></div><div style="text-align: justify;">Dhaka’s air quality index (AQI) score was 186 at 10.15 am today.</div><div style="text-align: justify;"><br></div><div style="text-align: justify;">An AQI between 201 and 300 is said to be ‘very unhealthy’, while a reading of 301 to 400 is considered 'hazardous', posing serious health risks to residents.</div><div style="text-align: justify;"><br></div><div style="text-align: justify;">Pakistan’s Lahore, India’s Delhi and Pakistan's Karachi occupied the first three spots in the list, with AQI scores of 505, 320 and 243, respectively.</div><div style="text-align: justify;"><br></div><div style="text-align: justify;">An AQI between 101 and 200 is considered 'unhealthy', particularly for sensitive groups.</div><div style="text-align: justify;"><br></div><div style="text-align: justify;">In Bangladesh, the AQI is based on five criteria pollutants -- Particulate Matter (PM10 and PM2.5), NO2, CO, SO2 and Ozone. UNB</div><div style="text-align: justify;"><br></div><div style="text-align: justify; ">bnbd24/kh</div>