Which was the most polluted country in the world in 2021, according to the World Air Quality Report?

The correct answer is Bangladesh.

Key Points

• According to the World Air Quality Report 2021, Bangladesh was identified as the most polluted country in the world.
• The average PM2.5 concentration in Bangladesh was recorded at 76.9 µg/m³, significantly higher than the WHO recommended safe levels.
• Dhaka, the capital city of Bangladesh, often ranks among the top cities with the worst air quality globally.
• Major contributors to the high levels of pollution in Bangladesh include industrial emissions, vehicle exhaust, and brick kiln operations.

Additional Information

• PM2.5: Particulate matter with a diameter of less than 2.5 micrometers, which can penetrate deep into the respiratory system and cause severe health issues.
• WHO Air Quality Guidelines: The World Health Organization recommends that annual mean concentrations of PM2.5 should not exceed 5 µg/m³ to avoid significant health risks.
• Health Impacts: Prolonged exposure to high levels of air pollution can lead to respiratory diseases, cardiovascular conditions, and premature death.
• Mitigation Measures: Strategies to reduce air pollution include improving fuel quality, enhancing public transportation, enforcing industrial regulations, and promoting renewable energy sources.
• Global Perspective: Besides Bangladesh, other countries with high pollution levels in 2021 included Pakistan, India, and Mongolia, highlighting a regional issue in South Asia.