Page 366 - Primary Six Notes

Natural causes of environmental degradation—Soil ero-

sion / leaching, Silting, Hurricanes, Tornados, Whirl wind /

whil pools, Earth quakes, Haisones, Land slides, Flood , Tsuna-

mis, Volcanic eruptions, Global warning .

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Soil / land degradation

This is the destruction / lowering the quality or usefulness of

land by human activities or natural causes.

Leaching

Is a process through which mineral salts or nutrients sink

deeper into the soil layers where they can not be reached by

plants

It is caused by too much rain.

Soil erosion

Is the washing / blowing away of top soil by agents of erosion.