According to the Global Water Policy Project, most cities in developing countries discharge ____ of their untreated sewage directly into rivers, streams, and lakes whose waters are then used for human consumption.

According to the Global Water Policy Project, most cities in developing countries discharge ____ of their untreated sewage directly into rivers, streams, and lakes whose waters are then used for human consumption.



a. 1020%
b. 2030%
c. 4050%
d. 5060%
e. 8090%




Answer: E


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