Deforestation, its Causes and Effects in Pashto by Sabar Khan | Class 9 Biology Chapter Biodiversty скачать в хорошем качестве

Deforestation, its Causes and Effects in Pashto by Sabar Khan | Class 9 Biology Chapter Biodiversty

this lecture is about deforestation and its causes and effects. deforestation, causes and effects is a topic in 9th class biology chapter biodiversity. forest: large number of green trees in an area is called forest. advantages of forest or importance of forest: production of oxygen. keep the air clean. provide habitat for wildlife. sources of fuel. sources of timber. provide recreation. control floods. prevent soil erosion. prevent formation of desert. deforestation: removal of trees in an unwise and unplanned manner is called deforestation. deforestation is a major cause of loss of biodiversity. causes of deforestation or reasons for deforestation: a. extension of cities due to over population. building of roads. building of houses because of over population. agricultural activities. pastures for grazing. wood for fuel and timber. timber mafia cut the trees for easy cash. effects of deforestation: soil erosion. habitat loss for wildlife. extinction of many species. floods. climatic change. formation of desert which is called desertification. control of deforestation: deforestation can be controlled by either afforestation which is a process of establishing new forest, or reforestation which is a process of renewing old forest in an area. the lecture "deforestation-causes and effects" has been explained and discussed by sabar khan in pashto language with detail explanation and information. key words: forest importance wildlife deforestation desert desertification causes effects control afforestation reforestation #deforestation #causesofdeforestation #effectsofdeforestation #controlofdeforestation #afforestation #reforestation