Top 10 Cleanest Countries

1. Finland, officially the Republic of Finland, is a Nordic country situated in Northern Europe

2. Norway, officially the Kingdom of Norway , is a country in Northern Europe that occupies the western portion of the Scandinavian Peninsula

3. Canada is a country occupying most of northern North America, and is the world's second largest country by total area

4. Sweden, officially the Kingdom of Sweden, is a Nordic country on the Scandinavian Peninsula in Northern Europe

5. Switzerland, officially the Swiss Confederation, is a landlocked nation of 7

6. New Zealand

7. The Commonwealth of Australia is a country in the southern hemisphere comprising the mainland of the world's smallest continent, the major island of Tasmania and a number of other islands in the Southern, Indian and Pacific Oceans

8. Austria, officially the Republic of Austria, is a landlocked country in Central Europe

9. Iceland, officially the Republic of Iceland is a country of northwestern Europe, comprising the island of Iceland and its outlying islets in the North Atlantic Ocean between the rest of Europe and Greenland

10. Denmark, officially the Kingdom of Denmark is the southernmost and geographically smallest of the five Nordic countries if its offshore territories are excluded, and the largest if they are included