Question

The main cause of poor water quality in Middle Eastern cities is __________.

A. the spilling of oil into all of the rivers and seas
B. dams blocking water from reaching the cities
C. the dumping of sewage into water resources
D. farmers using all of the water for irrigation

Answer 1

C. the dumping of sewage into water resources — untreated or poorly treated sewage is a primary source of pollution in many Middle Eastern urban water supplies.