The 2012 Environmental Performance Index (EPI) (99 page pdf, Yale Center for Environmental Law and Policy, Yale University, Center for International Earth Science Information Network, Columbia University, 2012)
Also discussed here: New Rankings on Environmental Performance (The Dirt, ASLA, Jun. 5, 2012)
The Environmental Performance Index assesses the relative progress of 132 countries with 22 performance indicators. The 2012 ranking showed Switzerland, Latvia and Norway at the top, Canada in 37th position and the USA, 49th. Rising greenhouse gas emissions are a particular challenge for developed countries while safe drinking water is the biggest one for developing countries. Major data gaps exist for monitoring air pollution and greenhouse gas with the notable exception of the European Union(which had 20 of the top ranked 22 countries overall).
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