The main sources of soil pollution are:
1. Improper disposal of human and animal excreta, solid and liquid wastes.
2. Domestic refuse and industrial wastes dumped on the land.
3. Wastes from mining of coal and other minerals dumped on the land.
4. Fertilizers and pesticides used in agriculture.
5. Radioactive refuge from laboratories, industries and hospitals.
6. Removal of the upper fertile layer of soil.
