Tropical Forest Temperate Forest Natural Vegetation Boreal Forest Savanna Grassland Shrubland Tundra Semi Desert Desert Ice 0 10 10 20 20 30 Croplands 30 40 40 50 50 60 60 70 70 80 80 90 90 100 0 10 10 20 20 30 Pastures and Rangelands 30 40 40 50 50 60 60 70 70 80 80 90 90 100 Cumulative population billions DI Q unitless 1 0 0 4 0 2 0 1 0 01 0 001 0 000 Contemporary Sc1 Sc2 Sc3 0 9 1 2 1 4 1 7 2 9 4 1 4 8 0 8 1 0 1 3 1 6 2 9 4 1 4 8 1 9 2 4 2 8 3 2 5 4 7 0 8 0 1 6 2 2 2 7 3 2 5 4 7 0 8 0 A Q unitless 1 0 0 4 0 2 0 1 0 01 0 001 0 000 Cumulative dependent population billions Contemporary Sc1 Sc2 Sc3 1 5 1 9 2 2 2 6 3 8 4 5 4 8 1 4 1 8 2 1 2 5 3 8 4 5 4 8 2 7 3 4 4 0 4 7 6 7 7 6 8 0 2 7 3 3 3 9 4 7 6 6 7 6 8 0 Fig 1 Spatial distribution of annual water vapor flows mm yr from potential vegetation before human impacts Fig 4 Spatial distribution of net changes in vapor flows between potential vegetation and actual deforested and irrigated vegetation in mm yr
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