A. Aerobic
B. Pathogenic
C. Anaerobic
D. Non-pathogenic
A. 1000 to 2000
B. 3000 to 6000
C. 6000 to 9000
D. 10000 to 100000
A. Forest fire
B. Deforestation
C. Volcanic eruption
D. None of these
A. Incineration
B. Biological oxidation
C. Composting
D. None of these
A. Packed scrubber
B. Gravity settling chamber
C. Electrostatic precipitator
D. Hydrocyclone
A. Dilution with inert material
B. Discharging to atmosphere through tall stacks after dilution
C. Disposing off in rivers & oceans
D. Filling in steel crates and shooting it off out of earth’s gravity
A. 50
B. 1000
C. 2000
D. 5000