1: India ranks as the world's most polluted country, facing severe air quality issues.

2: China struggles with high levels of air pollution, impacting citizens' health and the environment.

3: Bangladesh battles pollution from factories, vehicles, and burning waste, leading to health concerns.

4: Pakistan contends with poor air quality due to industrial emissions and traffic congestion.

5: Indonesia faces pollution challenges from deforestation, agriculture, and urban development.

6: Nigeria grapples with pollution from oil production, traffic congestion, and waste management issues.

7: Iran struggles with pollution from industrial activities, vehicle emissions, and dust storms.

8: Russia deals with pollution from industrial activities, transportation, and waste disposal.

9: Saudi Arabia faces pollution challenges from oil refineries, desalination plants, and vehicle emissions.