A total of 75 basic indicators are used for 128 countries. Definitions of indicators are taken from Esty et. al. (2005), Food and Agricultural Organization(FAO), International Union for the Conservation of Nature (IUCN, 1994), Organization of Economic Cooperation and Development (OECD, 2000; 2004; and website), Ordoubadi (2005), United Nations Environmental Program (UNEP), United Nations Statistics Division (2006), United Nations Development Program (UNDP, 2003), United Nations Educational, Scientific, and Cultural Organization (UNESCO), United Nations Framework Convention on Climate Change (UNFCCC), World Health Organization (WHO), World Bank (1995; 2008), and the Freedom House Annual Survey (2007). Many of these references also provide annual data about basic indicators for most countries of the world.

References

• Esty DC, Levy M, Srebotnjak T, Sherbinin A (2005) 2005 Environmental Sustainability Index: Benchmarking National Environmental Stewardship, New Haven, CT, Yale Center for Environmental Law and Policy.
• FAO (Food and Agriculture Organization) Satistics data.
• IUCN (International Union for the Conservation of Nature) (1994) Guidelines for protected areas management categories, IUCN, Cambridge, UK and Gland, Switzerland.
• OECD (Organization of Economic Cooperation and Development) Statistics portal.
• OECD (2000) Education at a glance, OECD Publications, Paris.
• OECD (2004) Key environmental indicators 2004, OECD, Paris.
• Ordoubadi SMH (2005) World Development Indicators, The World Bank Development Data Center, Washington, DC.
• UNEP (United Nations Environmental Program), Geodata portal, electronic database.
• United Nations Statistics Division (2006) Population and vital statistics report, United Nations, New York, NY.
• UNDP (United Nations Development Program) (2003) Human Development Report 2003, Oxford University Press, New York.
• UNESCO (United Nations Educational, Scientific, and Cultural Organization), Institute for Statistics, Custom tables, electronic database.
• UNFCCC (United Nations Framework Convention on Climate Change), GHG emissions data.
• WHO (World Health Organization). Core health indicators, electronic database.
• World Bank (1995) Monitoring environmental progress: A report on work in progress, World Bank Environmentally Sustainable Development International Bank for Reconstruction and Development, Washington, DC.
• World Bank (2008) KI and KEI Indexes (KAM 2008), electronic database.