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Tropical Rainforests

Deforestation: rates, causes and impacts

  • 3 things to know
  • Paper 1

Overview

How deforestation rates are measured and change, subsistence and commercial farming, logging, roads, mining, energy development, settlement and population growth as causes, and economic development, soil erosion and climate change as impacts.

What you need to know

Answer each one before you reveal it.

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Key term

How does logging destroy rainforest?

Key term

What is deforestation?

Key term

Name two things that can make the rate of forest loss in a country fall.

Questions from this subtopic

Each one with the model answer underneath.

  1. 1

    What is deforestation?

    Model answer

    The clearing of forest, usually so that the land can be used for something else.

  2. 2

    How is a rate of deforestation measured?

    Model answer

    By the area of forest lost over a set period, usually given in hectares or square kilometres per year, or as a percentage of the forest that remained at the start.

  3. 3

    Has forest been lost at a steady rate around the world?

    Model answer

    No, the rate rises and falls over time and differs greatly between countries, so some have slowed their losses while others have speeded up.

  4. 4

    Name two things that can make the rate of forest loss in a country fall.

    Model answer

    Protection laws that are properly enforced, and international agreements or payments that reward a country for leaving its forest standing.

  5. 5

    Name two things that can make the rate of forest loss rise sharply.

    Model answer

    Rising world prices for beef, timber or minerals, and new roads that open up parts of the forest that could not be reached before.

  6. 6

    What is subsistence farming and how does it clear forest?

    Model answer

    It is farming to feed the farmer's own family, and a plot is cleared by cutting and burning, then abandoned once the poor soil is exhausted, so fresh forest has to be cleared.

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