Introduction to Global Warming

Q. Match the greenhouse gas with its percentage contribution to global warming:

1. A - 2, B - 3, C - 1, D - 4
2. A - 1, B - 3, C - 2, D - 4
3. A - 3, B - 1, C - 2, D - 4
4. A - 1, B - 3, C - 2, D - 4

Q. Which of the following strategies is not a correct approach to reduce global warming?

1. Reducing the green house gas emission by limiting the use of fossil fuels
2. Increases the vegetation cover particularly the forest for photosynthetic utilization of CO₂
3. Minimizing the use of nitrogen fertilizers, in agriculture for reducing NO₂ emission
4. Increasing the use of air conditioners, refrigeration unit and production of plastic

Q. Regarding the assertion and reason, choose the correct option:
Assertion [A]: Methane component of greenhouse gases contributes to global warming by about 20 percent.
Reason [R]: Introduction of multipoint fuel injection engines in automobiles has decreased methane content in exhausts.

1. Assertion is true but Reason is false
2. Both Assertion and Reason are true and Reason is the correct explanation of Assertion
3. Both Assertion and Reason are false
4. Both Assertion and Reason are true but Reason is not the correct explanation of Assertion

Q. Which of the following is NOT associated with the control of global warming?

1. The Montreal Protocol
2. The Kyoto Protocol
3. UNFCCC
4. Both B and C

Q. Global warming is caused due to an abnormal increase in the amounts of ___ gases in the atmosphere.

Q. Regarding the assertion and reason, choose the correct option.
Assertion [A]: Deforestation is one main factor contributing to global warming.
Reason [R]: Besides CO₂, methane and CFCs are also greenhouse gases.

1. Assertion is true but Reason is false
2. Both Assertion and Reason are false
3. Both Assertion and reason are true and Reason is the correct explanation of Assertion
4. Both Assertion and Reason are true but Reason is not the correct explanation of Assertion

Q.

Greenhouse gases are

1. Absorbers of long-wave radiations from earth

2. Transparent to both solar radiations and long-wave radiations from earth

3. Absorbers of solar radiations for warming the atmosphere of earth-

4. Transparent to emissions from earth for passage into outer space

Q. Global warming and greenhouse effect are synonyms of the same phenomenon.

1. True
2. False

Q. Global warming is basically the result of

1. ozone layer depletion
2. naturally occurring greenhouse gases in the earth’s atmosphere
3. population explosion
4. anthropogenic activities such as deforestation and industrialisation.

Q. Global warming is caused due to an abnormal increase in the amounts of ___ gases in the atmosphere.