9. Explain how soil pollution and soil erosion could be prevented.
The ways to prevent soil pollution are:
(i) Recycling of non-biodegradable wastes.
(ii) Limiting the use of pesticides and insecticides.
(iii) Making dumping grounds of non-biodegradable wastes far away from fertile land.
The removal of land surface by water, wind or ice is known as erosion. The ways to prevent soil erosion are:
(i) Afforestation or planting of trees.
(ii) Reduce cutting down of trees or deforestation.
(iii) Using step farming in hilly regions