| http://www.w3.org/ns/prov#value | - In the 1980s, watersheds covered by spruce stands, particularly in the high plateau, were damaged significantly as a consequence of acid atmospheric deposition (from lignite combustion) and inappropriate forestry practices: development of spruce plantations of lower stability (e.g. more sensitive to environmental stresses such as climate, wind, air pollution and acid deposition, insect epidemics),
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