Science, asked by vibhasmondal9, 2 months ago

what is desertification? why does it occur ?​

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Answered by Anonymous
2

Answer:

  • Desertification refers to the persistent degradation of dryland ecosystems by climatic variations and human activities. It occurs on all continents (except Antarctica) and affects the livelihoods of millions of people, including a large proportion of the poor in drylands.

  • Human activities that contribute to desertification include the expansion and intensive use of agricultural lands, poor irrigation practices, deforestation, and overgrazing. These unsustainable land uses place enormous pressure on the land by altering its soil chemistry and hydrology.

Explanation:

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Answered by suddu150903
1
Considerable controversy exists over the proper definition of the term “desertification” for which Helmut Geist (2005) has identified more than 100 formal definitions.The most widely accepted of these is that of the Princeton University Dictionary which defines it as “the process of fertile land transforming into desert typically as a result of deforestation, drought or improper/inappropriate agriculture”

The earliest known discussion of the topic arose soon after the French colonization of West Africa, when the Comité d’Etudes commissioned a study on desséchement progressif to explore the prehistoric expansion of the Sahara Desert.
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