Environmental Performance Index (EPI)

I found one interesting article. According to this article and 2010 Environmental Performance Index (EPI) made by Yale University’s environmental center and Columbia University, Iceland recorded number one country which is cleanest and most abided by the environmental law..But I am a little suspecting about the estimate standard of the Index but, the evaluation will can be model for the environmental problem and policy evaluation in terms of technique such as the setting of cost and benefit.

EPI site:http://epi.yale.edu/

Article:http://www.mlive.com/environment/index.ssf/2010/02/kirk_heinze_reflections_on_the.html