Disadvantage of deforestation is

Concept:

• Deforestation is the permanent removal of trees to make room for something besides the forest.
• This can include clearing the land for agriculture or grazing or using the timber for fuel, construction, or manufacturing. 

Explanation:

Increase in soil erosion:

• Deforestation is one of the major causes of soil erosion.
• Plants keep soils bound in locks of roots, and thus, prevent erosion.
• They also add humus to the soil by shedding leaves and twigs.
• Forests have been denuded practically in most parts of India but their effect on soil erosion is more in hilly parts of the country.

Important Points

Consequences of deforestation:

• Reduction in groundwater.
• Exposing soil to heat and rain
• Flooding
• Loss of biodiversity
• Displacement of indigenous communities
• Climate change
• Economic loss
• Landslides
• Decreased rainfall

Thus, the disadvantage of deforestation is Increase in soil erosion.