Question

Which of the following can be natural sources of water pollution?

a.
volcanic activity
b.
earthquakes
c.
algae blooms
d.
all of the above

Answer 1

d. all of the above

- Volcanic activity can release ash, acids and metals into water.
- Earthquakes can stir sediments, cause landslides, break pipes or release buried contaminants into water.
- Algal blooms (including toxic blooms) are a natural biological source of water pollution (often worsened by nutrients from human activity).