References/Notes/Attributions:
Source
ESI Component Indicators. \emph{2005 Environmental Sustainability Index: Benchmarking National Environmental Stewardship
, Yale Center for Environmental Law and Policy, Yale University & Center for International Earth Science Information Network (CIESIN), Columbia University In collaboration with: World Economic Forum, Geneva, Switzerland Joint Research Centre of the European Commission, Ispra, Italy. Available at http://www.yale.edu/esi. }