Subjects: PERMAFROST ecosystems; INTRODUCED species; FOREST animals
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Subjects: EMISSIONS (Air pollution); COAL-fired power plants; AIR pollutionUNITED StatesUNITED StatesUNITED StatesReport Available
Subjects: GARDENING; ORNAMENTAL plants; DOGWOODSUNITED StatesUNITED StatesUNITED StatesReport Available