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प्रश्न
What do you mean by global warming?
Explain the term ‘global warming’.
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उत्तर १
Global warming means the increase in average effective temperature near the Earth’s surface due to an increase in the amount of greenhouse gases in its atmosphere.
उत्तर २
If the percentage of greenhouse gases increases, the Earth’s surface temperature rises. “The rise in average temperature of Earth’s surface is called global warming.”
संबंधित प्रश्न
What are green house gases? How are they responsible for global warming?
Write True or False.
Aeroplanes flying in the sky cause global warming.
Match the Columns:
| Column A | Column B |
| 1. Ozone depletion | a. GHG |
| 2. Methane | b. Disappearance of habitat |
| 3. Deforestation | c. UV rays from the sun |
| 4. Fossil fuel | d. CFCs |
| 5. Global warming | e. comes from cattle |
Name important Greenhouse gases.
How can global warming can be reduced?
Incomplete combustion of fuel such as petrol and diesel gives
Match the items of Column A with those of Column B.
| Column A | Column B |
| (a) sulphur dioxide | (i) damage ozone layer |
| (b) carbon dioxide | (ii) reduces oxygen-carrying capacity of blood |
| (c) carbon monoxide | (iii) acid rain |
| (d) chlorofluorocarbons | (iv) green house gas |
Find out the wrong statement and write it in its correct form.
A brick kiln emits lot of smoke and other harmful gases causing air pollution.
In the following statement, the underlined words are jumbled up. Write them in their correct form.
Whenever harmful substances such as wagese, toxic chemicals, silt, etc. get mixed with water, the water becomes potdulle.
Write any two effects of global warming.
