File:WWDR4 Global physical and economic water scarcity.png

WWDR4_Global_physical_and_economic_water_scarcity.png(800 × 404 像素,檔案大小:57 KB,MIME 類型:image/png


摘要

描述
English: World Water Development Report 4. World Water Assessment Programme (WWAP), March 2012.
日期
來源 http://www.un.org/waterforlifedecade/scarcity.shtml
作者 World Water Assessment Programme (WWAP)

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