Question

What are the uses of soil ? How to preseve soil ??? Threats it is facing !???

Answer 1

there are many uses of soil few of the are 
1. agriculture 
2. its is needed for recharging ground water level
3. it provide minerals and nutrients that are taken up by the plant 

afforestation is the best way to preserve soil erosion 

threat
deforestation - roots of trees help to bind the soil no trees causes erosion
concrete constructions

HOPE IT HELPS