A.Many natural or semi-natural ecosystems
B.Some of which may be high biological diversity, are of considerable benefit to man
C.To role of forests in watershed regulation and stabilization of soils in erosion-prone areas
D.All of the above
A.Many natural or semi-natural ecosystems
B.Some of which may be high biological diversity, are of considerable benefit to man
C.To role of forests in watershed regulation and stabilization of soils in erosion-prone areas
D.All of the above