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《世界人为土壤退化图》
desert.
World Map of Human Induced Soil Degradation
(国际土壤咨询中心与联合国环境规划署于1990年编制,比例尺为1 : 1000万。据此计算的全球人为土壤退化面积为3592万km²、占全球陆地面积的 26.0%)
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