WASHINGTON - Countries from Europe and South America dominated the top spots in the 2005 index of environmental sustainability, which ranks countries on their success at tasks like maintaining or improving air and water quality, maximizing biodiversity and cooperating with other countries on environmental problems.
Finland, Norway and Uruguay held the top three spots in the ranking, prepared by researchers at Yale and Columbia universities.
The United States ranked 45th of the 146 countries studied, behind such countries as Japan, Botswana and Bhutan, and most of Western Europe.
http://www.iht.com/articles/2005/01/24/news/environment.html