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The 2014 Environmental Performance Index is a joint project between the Yale Center for Environmental Law & Policy (YCELP) and the Center for International Earth Science Information Network (CIESIN) at Columbia University, in collaboration with the World Economic Forum and support from the Samuel Family Foundation and the McCall MacBain Foundation. For more information about the rationale behind the project, see Why Measurement Matters and Why Rank?


The Yale Center for Environmental Law & Policy, a joint research institute between the Yale School of Forestry & Environmental Studies and Yale Law School, seeks to incorporate fresh thinking, ethical awareness, and analytically rigorous decisionmaking tools into environmental law and policy.


The Center for International Earth Science Information Network’s mission is to provide access to and enhance the use of information worldwide, advance understanding of human interactions in the environment and serve the needs of science and public and private decisionmaking.

About the World Economic Forum

The World Economic Forum is an independent international organization committed to improving the state of the world by engaging business, political, academic and other leaders of society to shape global, regional and industry agendas.

About the Samuel Family Foundation

The Samuel Family Foundation has a long history of supporting the arts, healthcare and education. In recent years, it has broadened its mandate internationally, to engage in such partnerships as the Clinton Global Initiative, and participate in programs aimed at global poverty alleviation, disability rights and human rights advocacy, environmental sustainability, education and youth programs.

About the McCall MacBain Foundation

The McCall MacBain Foundation (MMF) is a grant-making organization established in Geneva, Switzerland by John and Marcy McCall MacBain. Its mission is to improve the welfare of humanity through focused grants in education, health and the environment.

This report was made possible by the generous support of the Samuel Family Foundation and the McCall MacBain Foundation.


Yale Center for Environmental Law & Policy, Yale University

Dr. Angel Hsu, Principal Investigator and EPI Project Director

Professor Jay Emerson, Senior Investigator and Lead Statistician

Laura Johnson, Environmental Performance Analyst

Omar Malik, Environmental Performance Analyst

Jason D. Schwartz, Environmental Performance Analyst

Abraham Allison, Research Assistant

Kelly Coplin, Research Assistant

Sarah Guy, Research Assistant

Marissa Knodel, Research Assistant
Breanna Lujan, Research Assistant

Nora Hawkins, Research Assistant

Rachel Lipstein, Research Assistant
​Olivia Mala, Research Assistant
William Miao, Research Assistant

Center for International Earth Science Information Network, Columbia University

Marc A. Levy, Deputy Director

Alex de Sherbinin, Senior Research Associate

Malanding Jaiteh, GIS Specialist


Professor Daniel C. Esty, Director (on leave), Yale Center for Environmental Law & Policy

Joshua Ulan Galperin, Associate Director, Yale Center for Environmental Law & Policy

Susanne Stahl, Program Coordinator, Yale Center for Environmental Law & Policy

Design and Development

Matthew Schwartz Design Studio

Production Design and Infographic Development

Anne Householder, Yale School of Architecture

Yinan Song, Yale College

Expert Contributors

Wenche Aas, Norwegian Institute of Air Pollution

Kym Anderson, University of Adelaide
Mark Ashton, Yale School of Forestry & Environmental Studies

Ricardo Barra, Universidad de Concepcion, Chile

Jamie Bartram, The Water Institute at University of North Carolina

Rachel Baum, The Water Institute at University of North Carolina

Peter Bjørnsen, UNEP-DHI Centre for Water and Environment

Kevin W. Bowman, University of California, Los Angeles

Jan Burck, Germanwatch – Climate Change Performance Index

Sergio Cinnirella, CNR-Institute of Atmospheric Pollution Research

Roberto Crotti, World Economic Forum

Thomas Damassa, World Resources Institute

Alexander Danilenka, World Bank Water and Sanitation Program

Jill Engel-Cox, Battelle Memorial Institute

Crystal Davis, World Resources Institute

Margareta Drzeniek-Hanouz, World Economic Forum

Ralf Ebinghaus, Institute of Coastal Research, Helmholtz-Zentrum Geesthacht, Germany

Martina Flöerke, University of Kassel

Johannas Friedrich, World Resources Institute

Hoi-Seong Jeong, Institute for the Environment and Civilizations

Jennifer Gee, University of British Columbia

Patrick Gerland, United Nations Department of Economic and Social Affairs

Paul Glennie, UNEP-DHI Centre for Water and Environment

Andres Gomez, American Museum of Natural History

Ramon Guardans, Soundplots

Ben Halpern, Ocean Health Index, UC Santa Barbara

Matthew Hansen, University of Maryland

Tom Harner, Environment Canada

Ian M. Hedgecock, CNR-Institute of Atmospheric Pollution Research

Mike Hoffmann, IUCN Species Survival Commission

Peter Holmgren, Center for International Forestry Research, FAO

Christina Hood, International Energy Agency

Hayley Hung, Environment Canada

Maria Ivanova, University of Massachusetts, Boston

Kim Ki-Ho, Research Institute for Climate Change Response

Nguyen Thi Kim Oanh, Asian Institute of Technology

Kristin Kleisner, NOAA

Moon Kook-Hyun, Yuhan-Kimberly Corporation, former

Michael Krzyzanowski, World Health Organization

Matthew MacLeod, Stockholm University

Randall Martin, Dalhousie University

Amy Milam, UNEP-WCMC

Michael Nagy, Qatar Government

David Lloyd Owen, Envisager

Jozef Pacyna, Gdansk University of Technology

Daniel Pauly, University of British Columbia

Yan Peng, C40 Cities Climate Leadership Group

Nicola Pirrone, CNR-Institute of Atmospheric Pollution Research

Roberta Quadrelli, International Energy Agency

Aaron Reuben, Research Consultant

Michaela Saisana, Joint Research Centre, European Commission

Andrea Saltelli, Joint Research Centre, European Commission

Sybil Seitzinger, International Geosphere-Biosphere Programme

Martin Scheringer, ETH Zurich

Sara Scherr, Eco Agriculture Partners

Christof Schneiders, University of Kassel

Drew Shindell, NASA Goddard Institute for Space Studies

Benjamin Skolnik, American Bird Conservancy

Kirk Smith, University of California, Berkeley

Francesca Sprovieri, CNR-Institute of Atmospheric Pollution Research

Tanja Srebotnjak, Ecologic Institute
Fred Stolle, Forest Landscape Objective, World Resources Institute

Elsie M. Sunderland, Harvard University

Ernesto Valenzuela, University of Adelaide
Aaron van Donkelaar, Dalhousie University

Stephanie Weber, Battelle Memorial Institute

Erica Zell, Battelle Memorial Institute

Yan Zhang, Chinese Academy of Sciences

Report Citation

Hsu, A., J. Emerson, M. Levy, A. de Sherbinin, L. Johnson, O. Malik, J. Schwartz, and M. Jaiteh. (2014). The 2014 Environmental Performance Index. New Haven, CT: Yale Center for Environmental Law and Policy. Available:


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The Environmental Performance Index (EPI) is constructed through the calculation and aggregation of 20 indicators reflecting national-level environmental data. These indicators are combined into nine issue categories, each of which fit under one of two overarching objectives. Click on "Learn More" to explore the complete methods.

Data Explorer

The EPI Data Explorer allows users to dynamically investigate global data: Compare environmental performance with GDP, population, land area, or other variables; create a chart that highlights all 178 ranked countries, only those in a specific region, or a custom-defined group. There's a lot more to the data than rankings, so dive in.