Global warming can be controlled by:
1. | Reducing reforestation, increasing the use of fossil fuel. |
2. | Increasing deforestation, slowing down the growth of the human population |
3. | Increasing deforestation, reduces the efficiency of energy usage. |
4. | Reducing deforestation, cutting down the use of fossil fuel. |
Which one of the following is a wrong statement?
1. | Most of the forests have been lost in tropical areas |
2. | Ozone in upper part of atmosphere is harmful to animals |
3. | Greenhouse effect is a natural phenomenon |
4. | Eutrophication is a natural phenomenon in freshwater bodies |
Which one of the following pairs of gases are the cause of 'Greenhouse effect'?
1.
2.
3.
4.
The two gases making the highest relative contribution to the greenhouse gases are:
1.
2.
3.
4.
1. CFCs 14%, CH4 20%
2. CO2 40%, CFCs 30%
3. N2O 6%, CO2 86%
4. CH4 20%, N2O 18%