What are the causes of soil erosion?
The causes of soil erosion are :
(i) Deforestation - The roots of the plants hold the soil particles tightly and the plants slow down the speed of flowing water thus preventing the soil from erosion.
(ii) Leaving land uncultivated for long time will cause the soil to erode.
(iii) Excessive grazing will remove the vegetation cover of the land and cause soil erosion.
(iv) Flood or heavy rains can wash away the soil and cause soil erosion.
(v) High speed winds can also carry away the top layer of the soil and cause its erosion.
List any three human activities which would lead to an increase in the carbon dioxide content of air.
List water pollutants.
When do we use the term water pollution. Give examples.
What are the methods of preventing or reducing soil erosion.
