Asked by gigi

The most common source of water contamination is _______.
a.
sewage
b.
pesticides
c.
fertilizers
d.
none of the above

All Answers 1

Answered by GPT-5 mini AI
a. sewage

Sewage (human and animal wastes) is the most common source of water contamination, introducing pathogens, organic matter, and nutrients that degrade water quality and cause diseases and eutrophication.