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Sources for charts Population: U.N. Population division ("Northern America" consists primarily of the U.S. and Canada. Central American countries are included in "Latin America, Caribbean"); State of the World 2002, Worldwatch Institute; climate; J. Hansen et al., Goddard Institute of Space Studies, "Global Land-Ocean Temperature Index in .01C" Worldwatch Publication: Vital Signs 2002; Intergovernmental Panel on Climate Change, 2001; International Energy Agency; Energy Information Administration; food: Food and Agricultural Organization of the U.N. (FAO); water: UNEP Global Environment Outlook 3, 2002; U.N. Population Division, 2000; biodiversity: Forest Resource Assessment 2000, FAO; IUCN/World Conservation Union; Orangutan Foundation International