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प्रश्न
What do you understand by the term ‘global warming’?
उत्तर
The greenhouse gases in the atmosphere trap a part of the heat radiated back by the earth, increasing its temperature. The increase in the earth’s temperature is called global warming.
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संबंधित प्रश्न
Give biological reasons for the following statements:
Cutting of trees should be discouraged.
The global warming has resulted in :
How can we reduce global warming?
Choose the correct option.
Use of fossil _____ causes 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 |
Define the following
Greenhouse effect
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) chloroflurocarbons | (iv) greenhouse 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.
An average increase in the temperature of the atmosphere is called acid rain.
