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Environmental Issues

Question
CBSEENBI12003219
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More than 70% of world's freshwater is contained in

  • Antartica

  • Glaciers and Mountains

  • Greenland

  • Polar ice

Solution

D.

Polar ice

Three fourth surface of earth (about 71 % of total) is occupied by oceans which contain 97.5% of total water. This is marine water with about 3.5% salt contents. Rest water i.e., 2.5% is freshwater, which occurs on land. Most amount of this water (about 1.97%) occurs as frozen ice caps and glaciers and 0.5% freshwater occurs as ground water.

Some More Questions From Environmental Issues Chapter

The cause of acid rain is :

Which one of the following causes ozone depletion ?

What disease is caused due to consumption of fishes captured from water contaminated with mercury ?

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 :

Discarded computer parts like monitors, key boards, mouse etc.

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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