Inundation of forests through dams

Loss of forests by artificial flooding
Submerging forests
Forests represent more than the market value of timber: dams destroy also such benefits as soil preservation, water replenishment, climatic stabilization, air purification and wildlife shelter. Bacterial decomposition and methane production in flooded forest areas are much faster than in pre-flood sediments, so contributing to global warming.
(E) Emanations of other problems