Question
Question: Which causes water pollution ?...
Which causes water pollution ?
A
Pathogens
B
Automobile exhausts
C
PCBs
D
(1) and (3)
Answer
(1) and (3)
Explanation
Solution
Pathogens include bacteria and other oganisms that enter water from domestic sewage and animal excreta.
PCBs (Polyuchlorinated biphenyls) are used as a fluids in transformers and capacitators. The presence of these PCBs in water causes skin disorder in human. These act as carcinogenic.