Explore these factors on why some countries have the cleanest air while others face severe pollution challenges.

Air quality varies greatly around the world due to multiple factors including industrial emissions, vehicular pollution, and geographic influences. Understanding the air quality index (AQI) and particulate matter levels helps clarify why certain countries enjoy pristine air while others suffer from heavy pollution.
Knowing which countries have the cleanest and worst air matters for public health and daily living. By recognizing the impact of environmental policies and natural conditions, readers can better appreciate the importance of cleaner air and take practical steps to protect their health and environment.