A. Sewage treatment
B. Manufacturing electricity
C. By checking atomic blasts
D. All of the above
Pollution
Pollution
A. Carbon monoxide
B. Sulphur dioxide
C. Ozone
D. Flourides
A. SO2
B. Fluoro-carbons
C. CCI4
D. CO
A. Plastics
B. Iron junks
C. Detergents
D. Glass junks
A. The natural geo-chemical cycles
B. The natural balance of our environment
C. The natural flora of a place
D. The natural wildlife of a region
A. Algae
B. Moss
C. Ferns
D. Distillated wastes
A. DDT
B. Bordeaux mixture
C. 2,4-D
D. DCMU
A. Hot water from power plants
B. Hot chemicals from industries
C. Waste from mines
D. Waste from agricultural fields
A. DDT is a growth retardant
B. DDT disturbed hormonal balance essential for fruit setting
C. DDT killed the pollinating insects along with the pests
D. DDT inhibited flowering
A. Automobile exhausts
B. Radioactive substances
C. Smoke
D. All of the above