A. Production of cereals
B. Trapping of UV rays
C. Cooling of earth
D. Warming of earth
Related Mcqs:
- Greenhouse effect is due to:
A. CO
B. CO2
C. NO2
D. PO4 - Greenhouse effect is:
A. Caused by CO2 only
B. Caused by CH4, SO2, NO2 gases
C. Caused by those gases which absorb the infra-red light reflecting from earth
D. Caused by combination of many gases - Maximum greenhouse gas is released by which of the following country?
A. USA/Korea
B. Pakistan
C. France
D. England - Which important greenhouse gas other than methane is being produced from the agricultural fields?
A. Arsine
B. SO2
C. NH3
D. N2O - Green house effect refers to:
A. Cooling of earth
B. Trapping UV rays
C. Production of cereals
D. warming of earth - Ozone hole is refers to as:
A. Hole in ozone layer
B. Decrease in the ozone layer in troposphere
C. Decrease in thickness of ozone layer in stratosphere
D. Increase in the thickness of ozone layer in troposphere - The term ‘Bio-magnification’ refers to the:
A. Growth of organism due to food consumption
B. Increase in population size
C. Blowing up of environmental issues by man
D. Increase in the concentration of non-degradable pollutants as they pass through food chain
E. Decrease in population size - The toxic effect of carbon monoxide is due to its greater affinity for haemoglobin as compared to oxygen by (appro.)
A. 20 times
B. 100 times
C. 2 times
D. 200 times - The most harmful effect of ionising radiations precisely involves:
A. Cell membranes
B. DNA
C. Mitochondria and ribosomes
D. Nucleus - The effect of pollution is first and most marked on:
A. Natural flora of a place
B. Natural balance of our environment
C. Natural geo-chemical cycles
D. All the above three
The correct answer to the question: "Greenhouse effect refers to:" is "Warming of earth".