Dams would safeguard the forests, and the great diversity of plant and animal species they shelter, as felling causes siltation and decrease in rainfall.
(Dams; would safeguard; the forests) (they; shelter; as felling causes siltation and decrease in rainfall) (felling; causes; siltation and decrease in rainfall)
Dams they felling
would safeguard shelter causes
the forests
as felling causes siltation and decrease in rainfall
siltation and decrease in rainfall