Question

how has uncoupling sanitary sewers from storm drains helped in pollution control? it eliminated sewage treatment plants. it reduced sewage overflow into rivers. it resulted in more contagious diseases.

Explanation:

Uncoupling sanitary sewers from storm drains means that sewage and stormwater have separate systems. Sewage treatment plants are still needed, so the first option is wrong. Contagious diseases would not be a positive outcome, so the third option is wrong. When systems are combined, heavy rain can cause sewage to overflow into rivers. Separating the systems (uncoupling) reduces this overflow, which helps in pollution control as less sewage (which is polluting) enters water bodies like rivers.

Answer:

It reduced sewage overflow into rivers.