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Environmental Issues

Question

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State the cause of accelerated eutrophication.

Solution

Causes of accelerated eutrophication:

i) Industrial wastes which are a great source of nitrogen and phosphorous that over-stimulate the algal growth.

ii) Sewage and agricultural wastes also lead to increase in temperature and BOD of the water body thereby leading to algal blooms.

Some More Questions From Environmental Issues Chapter

Smog is a mixture of :

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.

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