<div style="text-align: justify; "><b style="font-size: 1rem;">Air pollution still remains one of the top-most challenges for Bangladesh, and among cities around the world, Dhaka’s air quality has been ranked as the most polluted this morning.</b><br></div><div style="text-align: justify; "><br></div><div style="text-align: justify;">The capital's air quality index (AQI) was recorded at 259 at 9:20am today.</div><div style="text-align: justify;"><br></div><div style="text-align: justify;">India's Kolkata and Delhi occupied the next two spots, with AQI scores of 232, and 225, respectively.</div><div style="text-align: justify;"><br></div><div style="text-align: justify;">An AQI between 201 and 300 is said to be 'poor', 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;">In Bangladesh, the AQI is based on five criteria pollutants -- Particulate Matter (PM10 and PM2.5), NO2, CO, SO2 and Ozone.</div><div style="text-align: justify;"><br></div><div style="text-align: justify;">Dhaka has long been grappling with air pollution issues. Its air quality usually turns unhealthy during winter. UNB</div><div style="text-align: justify;"><br></div><div style="text-align: justify; ">bnbd24/kh</div>