Causes of Desertification

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Questions and Answers

Which of the following is a major cause of desertification?

  • Industrial pollution
  • Natural disasters
  • Excessive rainfall
  • Deforestation (correct)

What happens to the soil when overgrazing occurs?

  • It breaks up and becomes drier (correct)
  • It retains more moisture
  • It becomes more fertile
  • It becomes more compact

How does soil erosion contribute to desertification?

  • It results in the loss of topsoil (correct)
  • It helps to bind the soil together
  • It increases plant species diversity
  • It conserves moisture

What is one of the effects of increased drought and loss of topsoil?

<p>Loss of fertile topsoil (D)</p> Signup and view all the answers

What role do tree roots play in preventing desertification?

<p>They help to bind the soil together (A)</p> Signup and view all the answers

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Study Notes

Desertification Causes and Effects

  • Overgrazing is a major cause of desertification, leading to the degradation of land and soil quality.
  • When overgrazing occurs, the soil is depleted of its vegetation cover, causing it to become vulnerable to erosion and loss of nutrients.

Soil Erosion and Desertification

  • Soil erosion contributes to desertification by removing the topsoil layer, which is rich in nutrients, and reducing the soil's ability to support plant growth.

Drought and Desertification

  • Increased drought and loss of topsoil can lead to reduced crop yields, decreased agricultural productivity, and increased poverty.

Prevention of Desertification

  • Tree roots play a crucial role in preventing desertification by holding soil in place, maintaining soil quality, and reducing soil erosion.

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