Humans are particularly adept at water transformation; current estimates are that human activities have affected nearly _____ percent of the world's rivers.
A)10
B)40
C)70
D)100

Name: Humans are particularly adept at water transformation; current estimates are that human activities have affected nearly _____ percent of the world's rivers. A)10 B)40 C)70 D)100
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Question

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Human activities such as damming, diversion, and pollution have altered approximately 70% of the world's rivers, according to several studies.

Humans Are Particularly Adept at Water Transformation; Current Estimates Are