What amount of BOD indicates low water pollution?
A. 4000mg/liter
B. 1500mg/liter
C. 2000mg/liter
D. 15000mg/liter
Answer:B
What amount of BOD indicates low water pollution?
A. 4000mg/liter B. 1500mg/liter C. 2000mg/liter D. 15000mg/liter