Q13Multiple correct
Which of the following conditions shows the polluted environment.
- (i)pH of rain water is 5.6.
- (ii)amount of carbondioxide in the atmosphere is 0.03%.
- (iii)biochemical oxygen demand 10 ppm.
- (iv)eutrophication.
Show answer
(iii) biochemical oxygen demand 10 ppm.
(iv) eutrophication.