P1C 16Desertification Overview

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What is desertification?

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Desertification is the process by which arable land becomes desert, typically as a result of climate change or destructive land use.

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What are the natural causes of desertification?

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Natural causes include long-term changes in the Earth's orbit and tilt, fluctuations in the sun's energy output, and changes in ocean current patterns affecting rainfall.

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What human activities contribute to desertification?

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Human causes include overpopulation, overuse of land resources, overgrazing, cutting down plants, and wrong farming methods like ploughing.

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Describe the case study of the Sahel region in relation to desertification.

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The Sahara has expanded southwards into the semi-arid Sahel at a rate of one metre per day, covering villages with dunes and making farming difficult.

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What are the consequences of worsening desertification?

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Consequences include crop failure, death of farm animals, food shortages leading to hunger and famines, and forced migration causing conflicts.

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What initiatives are used to manage desertification?

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Initiatives include afforestation, the Green Wall of Africa, planting pits (Tassas), windbreaks, check dams, and sand dams.

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What is the Green Wall of Africa?

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A large-scale project involving countries working together to plant a line of trees to stop the Sahara Desert from spreading further south.

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What are planting pits (Tassas) and their purpose?

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Planting pits are holes filled with dried cattle dung and soil, used to plant hardy crops like millet and sorghum, allowing water infiltration and increasing soil fertility.

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What is a long-term solution to combat desertification?

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Slowing down population growth to reduce the number of animals that can damage the land.