The other great thing about rail is it takes up much less space, and where it does exist it generally doesn't create an impermeable layer above the underlying s

The other great thing about rail is it takes up much less space, and where it does exist it generally doesn't create an impermeable layer above the underlying soil. I was wondering about this last night. Fungi make up a large amount of soil mass and sequester a lot of CO2. If we cover a large area in concrete, do we lose this benefit by essentially killing the fungi beneath?