original: in modern times , the waters are 70 % to 90 % used for human purposes and the flow is much reduced .
simplifications: in modern times the waters are 70 % to 90 % used for human purposes . the flow of water is reduced . in today 's times , the waters are 70-90 % used for people and the flow is much less . in modern times , the waters are 70 % to 90 % used for human purposes and the flow is much smaller . in modern times , 70 % to 90 % of the water is used for human purposes and the flow is greatly reduced . in modern times , the waters are 70 % to 90 % used for human purposes and the flow is much reduced . in modern times , the water are 70 % to 90 % used for human purposes and the flow is lessened . the waters are 70 % to 90 % used for human purposes and have reduced flow . today , when 70-90 % of water is used by humans , the speed of water is slower .