Total Population, Current Population Density, and Projected Population Density                                                                
(HD16101 and HD16104)  
United Nations Population Division, 1993, Annual Populations (The 1994 Revision), United Nations, New York, on diskette.  
Total Urban Population  
United Nations (U.N.) Population Division, 1995, Urban and Rural Areas, 1950-2025 (The 1994 Revision), U.N., New York, on diskette.  
Urban Population in Coastal Cities  
UN Statistical Office, UN Office for Ocean Affairs and the Law of the Sea, Offshore Magazine, and other sources.  
GDP per Capita in Constant PPP  
Summers, Robert et al., 1994, The Penn World Table, Mark 5.6, University of Pennsylvania, Philadelphia.  
GDP from Agriculture, GDP from Industry, GDP from Services, and GDP Annual Growth Rate  
(EI15105, EI15106, EI15107, and EI15122)  
World Bank, 1994, World Tables 1994, World Bank, Washington, D.C.  
Total Land Area, Arable and Permanent Cropland, Permanent Pasture, Forest and Woodland, and Other Land  
(LC17101, LC17102, LC17104, LC17105, LC17106)  
Food and Agriculture Organization of the United Nations (FAO), 1995, FAOSTAT-PC, FAO, Rome, on diskette.  
Irrigated Land, Agricultural Labour Force, Total Labour Force, Cattle Stocks, Sheep Stocks, Goat Stocks, Pig Stocks,  
Equines (horses /mules/asses), Buffalo Stocks, Camel Stocks  
(FA18203, FA18509, FA18508, FA18301, FA18302, FA18303, FA18304, FA18305, FA18306, FA18307)  
Food and Agriculture Organization of the United Nations (FAO), 1995, FAOSTAT-PC, FAO, Rome, on diskette.  
Water Resources per Capita, Domestic Annual Withdrawals, Industry Annual Withdrawals, Agriculture Annual Withdrawals,  
(WA22102 and WA22109)  
Data were compiled by the World Resources Institute from the following sources:  
Forkasiewicz, J and J. Margat, 1980, Tableau Mondial de Donnees Nationales d Economie de l Eau, Ressources et Utilisation, Departement Hydrogeologie, Orleans, France.  
Margat, J, Bureau de Recherches Geologiques et Minieres, Orleans, France, April 1988 (personal communication).  
Belyaev, A.V., Institute of Geography, U.S.S.R. National Academy of Sciences,Moscow, September 1989 and January 1990 (personal communication).  
Gleick, P., Pacific Institute, Oakland, California, December 1995 (personal communication).  
Solley, W.B., R.R. Pierce, and H.A. Perlman, 1993, Estimated Use of Water in the United States,in 1990, U.S. Geological Survey Circular,  No. 1081, U.S. Geological Survey, Reston, Virginia.  
European Communities Commission, 1990, Environment Statistics 1989, Office des Publications Officielles des Communautes Europeennes, Luxembourg, p. 130.  
Economic Commission for Europe, 1992, The Environment in Europe and North America, United Nations, New York, pp. 15-23.  
United Nations Economic Commission for Europe (ECE), 1995, ECE Environmental Statistical Database, on diskette, Statistical Division, UN/ECE.  
Organisation for Economic Co-Operation and Development (OECD), 1995, OECDEnvironmental Data Compendium, OECD, Paris.  
Food and Agriculture Organization of the United Nations (FAO), 1995, Water Resources of African Countries, A Review, FAO, Rome, pp. 14-15.  
Total Commercial Energy Consumption, Commercial Hydroelectric Consumption  
(EM21201 and EM21106)  
United Nations Statistical Division (UNSTAT), 1995, 1993 Energy Statistics Yearbook, UNSTAT, New York.  
Traditional Fuel Consumption  
Food and Agriculture Organization of the United Nations (FAO), unpublished.  Estimates were prepared by the Food and Agriculture Organization of the United Nations (FAO) after an assessment of the available consumption data. Data were supplied by the answers to questionnaires or come from official publications.
Known Mammal Species and Endemic Mammal Species, Known Bird Species and Endemic Bird Species, and Known Plant Species and Endemic Plant Species  
(BI20401, BI20402, and BI20501)  
World Conservation Monitoring Centre (WCMC), 1995, unpublished data, Cambridge, U.K.  
World Conservation Monitoring Centre (WCMC), 1994, Biodiversity Data Sourcebook, World Conservation Press, Cambridge, U.K.  
World Conservation Monitoring Centre (WCMC), 1992, Global Biodiversity Status of  the Earth’s Living Resources, Chapman and Hall, London.