20 State of the cleanest in the world

This list is created by environmental experts from Yale University and University of Colombia with the use of EPI (Environmental Performance Index)

1. Switzerland

2. Sweden

3. Norway

4. Finland

5. Costa Rica

6. Austria

7. New Zeland

8. Latvia

9. Colombia

10. France

11. Island

12. Canada

13. Germany

14. UK

15. Slovenia

16. Lithuania

17. Slovakia

18. Portugal

19. Estonia

20. Croatia

sumber: http://juandry.blogspot.com/2010/01/20-negara-paling-bersih-di-dunia.html