EarthTrends. World Resources InstituteAn online collection of information regarding worldwide environmental, social, and economic trends. Includes statistical, graphic, and analytical data. Information is arranged by broad topic, such as Coastal and Marine Ecosystems, Climate and Atmosphere, Energy and Resources, Agriculture and Food, and others. Under each topic, the user can choose from a searchable database of data, data tables, country profiles, maps, or features (news and research). Requires free registration.