Currently towards 35% of human water use is unsustainable, drawing on diminishing aquifers and reducing the flows of major rivers: this percentage is likely to increase if climate change impacts become more severe, populations increase, aquifers become progressively depleted and supplies become polluted and unsanitary.
Trenutačno gotovo 35% ljudske uporabe vode je neodrživo, jer počiva na sve manjim akviferima i reducira tok većih rijeka; ovaj postotak vjerojatno će se povećati ako se klimatske promjene pogoršaju, stanovništvo naraste, akviferi postanu sve više iscrpljeni, a zalihe onečišćene i nehigijenske.