A. Smoke
B. 2, 4-D and pesticides
C. Automobile exhaust
D. Aeroplanes
Pollution
Pollution
A. SO2
B. CO
C. N2O
D. O3
A. It decreases CO2 concentration
B. It competes O2 to combine with haemoglobin
C. It is carcinogenic
D. It depletes O3 layer
A. Ozone and dust
B. NH3 and SO3
C. CO and SO3
D. NO2 and SO2
A. Excess CO2
B. Excess CO
C. Chloro-fluoro-carbon
D. Low rainfall
A. Malathion
B. Aldrin
C. Gamma BHC
D. None of these
A. CH4, N2, CO2 and NH3
B. CO2, O2, NO2 and NH3
C. Chloro-fluoro-carbons, CO2, NH3 and N2
D. CO2, chloro-fluoro-carbons, CH4 and NO2
A. CO
B. SO2
C. CO2
D. Hydrocarbons
A. Use of refrigerator
B. Increased combustion of oil and coal
C. Deforestation
D. All the above
A. Has been responsible for increasing the average global temperature in recent
B. Is advantageous since it supplies O2 for people travelling in jets
C. Hinders higher rate of photosynthesis
D. Helps in checking the penetration of ultra violet rays to earth