- As the deforestation increases , the soil fertility will decrease
- Topsoil is a kind of soil
- So, as the deforestation increases, the topsoil fertility will decrease

So, as the deforestation increases, the topsoil fertility will decrease
[Question]As a result of rain forest deforestation, some organisms lose their habitats. Which is also an effect of rain forest deforestation?
[Context]- As the deforestation increases , the soil fertility will decrease 
- Topsoil is a kind of soil