Where you live can have a huge impact on your health and well-being. High levels of pollution and poor hygiene are linked to diseases. Some countries take the lead in introducing measures that safeguard the quality of their citizens' air, water, waste management, and sanitation. To measure their cleanliness, Yale and Columbia have collaborated to develop the Environmental Performance Index (EPI). It ranks 180 countries based on 58 indicators across 11 categories, focusing on ecosystem vitality, climate change, and environmental health.
Intrigued? Click on the gallery to discover the 30 cleanest countries in the world!