Environmental Studies · Geography

Deforestation and Land Degradation

2,619 Questions

Deforestation and land degradation address the environmental impacts of human activities on natural ecosystems. Key areas include soil erosion, forest fires, and the consequences of overgrazing. These subjects frequently appear in the geography and environmental science sections of competitive exams.

Causes of deforestationForest fires consequencesSoil erosion factorsDesertification impactsAgroforestry benefitsReforestation advantages

Deforestation and Land Degradation Questions

Multiple choice

The use of wood, charcoal, and dung as major sources of energy in developing countries has led to increase in

  1. terrestrial and sub-terrestrial pollution

  2. dependence on fossil fuels

  3. deforestation

  4. ozone depletion
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

 The use of wood, charcoal, and dung as major sources of energy in developing countries has led to increase in ozone depletion.  Deforestation and the use of fossil fuels are both suspected of increasing the amount of carbon dioxide in the atmosphere. This is of worldwide concern because of its potential effects on the environment, such as global warming due to weakening of the ozone layer which protects the earth from harmful solar radiation.

Multiple choice

Which of the following is not the consequence of deforestation?

  1. Increase in temperature

  2. Increase in the level of ground water

  3. Increase in pollution level

  4. Increase in the level of carbon dioxide
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Deforestation causes increase in temperature, increase in pollution level, increase in the level of carbon dioxide and decrease in the level of ground water.

Multiple choice

Soil erosion is prevented by

  1. deforestation

  2. afforestation

  3. reducing CFCs

  4. using CNG in all transport

  5. -
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Afforestation is the process of planting trees, or sowing seeds, in a barren land that is devoid of any trees to create a forest. It prevents soil erosion.

Multiple choice

Soil erosion can be prevented by  

  1. afforestation

  2. overgrazing

  3. forest fire

  4. frequent floods
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

 Soil erosion can be prevented by afforestation, i.e. by planting trees.

Multiple choice

Which of the following is/are the reason(s) of present problem of climate change?

  1. Industrialisation

  2. Deforestation

  3. Unscientific agricultural practices

  4. All of the above
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Industrialisation, deforestation and unscientific agricultural practices are the reasons of present problem of climate change. These three factors mainly contribute to pollution, emission of greenhouse gases and run away of fertilisers and pesticides in water bodies resulting in disturbance in weather patterns.

Multiple choice

If a tropical rain forest is removed, it does not regenerate quickly as compared to a tropical deciduous forest this is because.

  1. the soil of rain forest is deficient in nutrients.

  2. propagules of the trees in a rain forest have poor viability.

  3. the rain forest species are slowgrowing.

  4. exotic species invade the fertile soil of rain forest.
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The rainforest soil is often of a reddish color, rather than brown. Nutrient levels in the soil are very low. This can be attributed to the clays in the rainforest soil are less chemically active and therefore less efficient at retaining nutrients and at depths of just a few centimetres below the soil surface, there is practically no organic matter at all.

Multiple choice

In natural reforestation, what is the role of human beings?

  1. They plant more and more trees.

  2. They put regular manures and fertilizers.

  3. They arrange water for trees and plants.

  4. They have no such role.

  5. They select the area where the forest has to be developed.
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Yes, it is the correct option. Reforestation can take place naturally also. If the deforested area is left undisturbed, it reestablishes itself. In natural reforestation, there is no role of human beings.

Multiple choice

Directions: For the Assertion (A) and Reason (R) given below, choose the correct alternative. Assertion (A): Proper discharge and disposal of industrial effluents can help preventing land degradation. Reason (R): Deforestation causes land degradation.

  1. A is true, R is false

  2. A is false, R is true

  3. Both A and R are true, but R is not the correct explanation of A.

  4. Both A and R are true and R is the correct explanation of A.
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Both A and R are true, but R is not the correct explanation of A. Both A and R present causes of land degradation.