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PLATE II Comparison of energy use and population density in China: (a) spatial population in China; (b) light emitted from energy-utilizing activities as moni- tored by satellite; (c) images a and b combined. SOURCE: Figure courtesy of A. Grubler and S. Prieler, International Institute for Applied Systems Analysis (IIASA), Laxenburg, Austria. Primary data sources used to derive the graphs in- clude disaggregated population density distributions assembled by the Land Use Change project at IIASA, and night-time luminosity data provided by C. Elvidge, National Oceanic and Atmospheric Administration.

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Il ~ 1 l 1200 1200 PLATE III Contemporary copper cycle on several spatial levels: (a) comparative annual rates of copper entering use in Asian countries around 1994. (b) compara- tive annual rates of copper on a regional basis shown on the world map. SOURCE: Graedel et al., 2003. Copyright permission granted by Yale University.