Question

Introduced sewage in water systems _______.
a.
decreases levels of phosphorus and nitrogen
b.
increases oxygen levels
c.
increases concentrations of solids
d.
leads to decreases in the temperature


Please select the best answer from the choices provided

A
B
C
D

Answer 1

C

Sewage adds organic and inorganic particulate matter (solids) to water; it also raises nutrient levels (N, P) and increases biological oxygen demand, which lowers dissolved oxygen.