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Environmental Issues

Question

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Which one of the following is a wrong statement

Most of the forests have been lost in tropical areas

Ozone in upper part of atmosphere is harmful to animals

Greenhouse effect is a natural Phenomenon

Eutrophication is a natural phenomenon in freshwater bodies

Solution

D.

Eutrophication is a natural phenomenon in freshwater bodies

Ozone (O₃) is an isotope of oxygen which exists is so-called ozone layer at a height of about 15-60 km in the middle and upper stratosphere and lower mesosphere. This ozone layer absorbs UV-rays of longer wavelength and protects life on Earth from damaging effects of these radiations.
Ozone in the lower atmosphere (troposphere) is regarded as a pollutant.

Some More Questions From Environmental Issues Chapter

WHO’s recommendations about the industrial noise limit is of :

Which of the atmospheric layer contains ozone layer ?

The amount of dissolved oxygen required by the microorganisms to degrade the organic wastes present in water is called ?

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” :

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