Top 10 Cleanest Countries in The World

Researchers at Yale and Columbia ranked countries' environmental performance based on 25 metrics, including water and air quality, habitat protection and the impact of the environment on the health of the population. European countries make up more than half of the top 30, while the U.S. ranks 61st. 1. Iceland EPI score: 93.5GDP per capita: $36,000Population: 311,000In the