Answer:
carbon monoxide
Step-by-step explanation:
Although it is a toxic molecule, carbon monoxide is not a water pollutant, unlike garbage, fertilizer and sewage.
Water pollution is the result of changes in its quality that make it unfit for consumption and harmful to the living organisms that inhabit it.
As its properties are changed, polluted water damages the natural environment and man.
Human action is primarily responsible for water pollution. The main sources of water pollution are agricultural, domestic and industrial activities.