The New Encyclopædia BritannicaEncyclopædia Britannica, 1983 - Encyclopedias and dictionaries |
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Page 41
... human health . Economic value . Unless viewed in terms of human survival , the economic value of conservation is sometimes difficult to demonstrate . Although the floating plants of the ocean , the microscopic phytoplankton , are of ...
... human health . Economic value . Unless viewed in terms of human survival , the economic value of conservation is sometimes difficult to demonstrate . Although the floating plants of the ocean , the microscopic phytoplankton , are of ...
Page 45
... human activity and by the it . In other words , although the procedures employed in effects of this activity on other forms of life . the harvesting of timber may assure a sustained yield , Water may also be considered an inexhaustible ...
... human activity and by the it . In other words , although the procedures employed in effects of this activity on other forms of life . the harvesting of timber may assure a sustained yield , Water may also be considered an inexhaustible ...
Page 533
... human culture and which has been practiced in most parts of the world , stems from an instinctive inability or refusal on the part of man to accept death as the definitive end of human life . Despite the horrifying evidence of the ...
... human culture and which has been practiced in most parts of the world , stems from an instinctive inability or refusal on the part of man to accept death as the definitive end of human life . Despite the horrifying evidence of the ...
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activity American animals appear areas authority become body called cause cells central century charge common complex conservation consists constant constitution consumer contain continental continued copper cosmic rays countries court crime criminal Crusade direct early effect electron elements energy England established Europe evidence example exist fact field force ground groups House important increase individual industrial involved Italy known land later less letters limited living major material means measure ment metal natural occur organic original particles particular party percent period person play political population position present problems protection reefs region remains result rule social South species structure theory tion United usually various