Jan 31(V7N) - qeven worse, reaching ‘very unhealthy’ levels. The AQI scale classifies air quality as follows:

101-150: Unhealthy for sensitive groups

151-200: Unhealthy

201-300: Very unhealthy

301+: Hazardous

Top three polluted cities today:

1. Delhi, India – AQI 358 (Hazardous)

2. Wuhan, China – AQI 203 (Very Unhealthy)

3. Kampala, Uganda – AQI 198 (Unhealthy)

The AQI in Bangladesh is measured based on five pollutants: PM10, PM2.5, NO2, CO, SO2, and ozone. Air pollution in Dhaka worsens in winter and improves during the monsoon season.

According to the World Health Organization (WHO), air pollution contributes to around 7 million deaths worldwide annually, mainly due to stroke, heart disease, chronic lung diseases, lung cancer, and respiratory infections.

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