Only ________ percent of the U.S.population is served by a system of sewers and adequate water treatment plants.

Name: Only ________ percent of the U.S.population is served by a system of sewers and adequate water treatment plants.
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Question

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Approximately 70 percent of the U.S. population is served by a system of sewers and adequate water treatment plants, reflecting significant infrastructure development in urban and suburban areas.

Only ________ Percent of the U