A. Grit
B. Dust
C. Powder
D. Smoke
A. Acidic
B. Neutral
C. Alkaline
D. Highly acidic
A. Biological oxygen pond
B. Aerated lagoons
C. Trickling filters
D. Gravity separator having oil skimming devices
A. Foaming
B. Odour nuisances
C. Undesirable plant growth
D. Turbidity
A. A primary pollutant
B. A secondary pollutant
C. Impervious to ultra-violet rays
D. Both B. and C.
A. Dermatitis (skin disorder)
B. Cancer
C. Asphyxiation
D. Asthma
A. Suppression of noise at the source itself
B. Path control of noise
C. Protection of operating personnel
D. All A., B. & C.