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Environmental Issues

Question
CBSEENBI12002459
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Which one of the following pairs of gases are the major cause of 'Greenhouse Effect'?

  • CO2 and CO

  • CFCs and SO2

  • CO2 and N2O

  • CO2 and O3

Solution

C.

CO2 and N2O

The phenomenon of keeping the earth warm due to presence of certain radiatively gases in the atmosphere is called green house effect (Fourier, 1827). The name is based after a similar warmer interior in a glass-enclosed green house where glass panes, CO2 and water vapour allow the solar radiations to enter but prevent the escape of long wave heat radiations. CO2 and N2O are the major causes of 'green house effect'. CO2 contributes 60% of total global warming. N2O contributes 6% to green house effect.

Some More Questions From Environmental Issues Chapter

The cause of acid rain is :

Which one of the following causes ozone depletion ?

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Which one of the following is not a green-house gas ?

Which gas contributes the maximum in global warming ?

Fill in the blanks with suitable words :

1. Increase in concentration of soluble salts in the soil is called.........

2. Aforestation can check the advancement of......... .

3. DDT is a serious pollutant as it is a.........pollutant and undergoes......... .

4 .........plant has become a troublesome weed in agricultural fields.

5 .........are major aerosol pollutant present in jet aircraft emission.

Write “True” or “False” :

Coin one word for the following statements :

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Coin one word for the following statements :
Degradation of organic waste by worms like red wigglers, white worms and earthworms.

Coin one word for the following statements :
Cleaning of vast areas covered by forests.

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