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502.53 --- 504.05 --- #Hist.Geol. --- #A9503A --- 504.05 Unfavourable influences of human activities on the environment. Ecotoxicology --- Unfavourable influences of human activities on the environment. Ecotoxicology --- 502.53 The unbalanced or disturbed nature complex as a whole. Global change --- The unbalanced or disturbed nature complex as a whole. Global change --- Nature --- Human ecology --- Population --- Effect of human beings on --- Global environmental change. --- Geografie --- Congresses. --- Fysische geografie --- Het Gekoppelde Systeem "Mens-Fysisch Milieu" --- (geofactoren, ecosysteemdiensten, menselijk impact op het fysisch milieu, landdegradatie, desertificatie, global change). --- Ecologie humaine --- Homme --- Congresses --- Congrès --- Influence sur la nature --- #Hist.Geol --- Nature - Effect of human beings on - Congresses --- Human ecology - Congresses --- Population - Congresses --- BIOSPHERE --- HUMAN ECOLOGY --- ENVIRONMENTAL IMPACT --- SOCIOLOGICAL ANALYSIS --- ENVIRONMENTAL ASSESSMENT --- CULTURAL VALUES --- BIOGEOCHEMICAL CYCLES --- MEETINGS --- ANTHROPOGENIC EFFECTS

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Biochemical variation. --- Plant chemotaxonomy.

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Industrial economics --- Third World: agricultural and food problems --- Demography --- Sub-Saharan Africa --- Food supply --- Agricultural productivity --- Congresses. --- -Agricultural productivity --- -63 --- 314 --- (6) --- $?$94/03 --- Productivity, Agricultural --- Agriculture --- Farm management --- Food control --- Produce trade --- Food security --- Single cell proteins --- Congresses --- Economic aspects --- Africa, Sub-Saharan --- -Africa, Black --- Africa, Subsaharan --- Africa, Tropical --- Africa South of the Sahara --- Black Africa --- Sub-Sahara Africa --- Subsahara Africa --- Subsaharan Africa --- Tropical Africa --- Population --- -Congresses --- -Population --- 63 --- Africa, Black --- Developing countries: agricultural and food problems --- Food supply - Africa, Sub-Saharan - Congresses --- Agricultural productivity - Africa, Sub-Saharan - Congresses