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Social Studies, 31.05.2021 15:30 damien1030

In developing countries, most sewage is: a. Discharged, untreated, into surface waters.
b. Handled via communal septic tanks.
c. Subjected to primary (physical) but not chemical treatment.
d. Subjected to both primary and secondary sewage treatment

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In developing countries, most sewage is: a. Discharged, untreated, into surface waters.
b. H...

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