Desertification

  • Desertification is degradation of land in arid, semi-arid and dry sub-humid areas.
  • It is caused primarily by human activities and climatic variations.
  • It does not refer to the expansion of existing deserts.
  • It occurs because dryland ecosystems, which cover over one third of world‘s land area, are extremely vulnerable to overexploitation and inappropriate land use.
  • Poverty, political instability, deforestation, overgrazing and bad irrigation practices can all undermine the productivity of the land.

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