Which of the following does not occur when the sewage is discharged into water

Options

A. Increase in `O_2`
B. Cyanophycean blooms occur
C. Depletion of `O_2` layers
D. Eutrophication

Answer

A

Explanation

When the sewage is discharged into water. There is increase in excessive concentration of nitrate and phosphate which promotes the excessive growth algae called algae bloom as a result there is a depletion of oxygen that supports a quality life.