Environmental Sustainability Index

An Initiative of the Global Leaders for Tomorrow Environment Task Force, World Economic Forum. The Environmental Sustainability Index (ESI) is a measure of overall progress towards environmental sustainability, developed for 142 countries. The ESI scores are based upon a set of 20 core "indicators," each of which combines two to eight variables for a total of 68 underlying variables. The ESI permits cross-national comparisons of environmental progress in a systematic and quantitative fashion. It represents a first step towards a more analytically driven approach to environmental decisionmaking. The documents made available here provide in-depth details on the analytical framework, quantitative methodology, and data sources that underlie the ESI .