List water pollutants.
Some water pollutaants are :
(i) Microorganisms e.g., protozoans, bacteria and viruses
(ii) Eggs or larvae of disease causing vectors like mosquitos.
(iii) Oil spills.
(iv) Fertilizers and pesticides.
(v) Radioactive wastes.
(vi) Industrial wastes.
(vii) Sewage disposals and domestic wastes.
What are the methods of preventing or reducing soil erosion.
When do we use the term water pollution. Give examples.
What are the causes of soil erosion?
List any three human activities which would lead to an increase in the carbon dioxide content of air.
