World dynamicsWright-Allen Press, 1971 - 142 pages |
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Page 26
... population to the maximum density that man can psychologically tolerate . birth and death rates . In the upper loop of Figure 2-5 , if population P rises , crowding ratio CR increases , the birth - rate - from - crowding multiplier BRCM ...
... population to the maximum density that man can psychologically tolerate . birth and death rates . In the upper loop of Figure 2-5 , if population P rises , crowding ratio CR increases , the birth - rate - from - crowding multiplier BRCM ...
Page 27
... population to the maximum that food can support . reversal of impact - where a rise in population tends eventually to produce a downward influence on population - identifies a negative loop , one which is ad- justing birth rate to ...
... population to the maximum that food can support . reversal of impact - where a rise in population tends eventually to produce a downward influence on population - identifies a negative loop , one which is ad- justing birth rate to ...
Page 29
... population and increases death rate to reduce population . At the same time , rising pollution ratio POLR reduces the food - from ... population P increases. Structure of the World System 29 Population Controlled by Natural Resources.
... population and increases death rate to reduce population . At the same time , rising pollution ratio POLR reduces the food - from ... population P increases. Structure of the World System 29 Population Controlled by Natural Resources.
Contents
Introduction | 1 |
Structure of the World System | 17 |
A World Model Structure and Assumptions | 31 |
Copyright | |
6 other sections not shown
Common terms and phrases
accumulation action actual agriculture appear assumed assumptions average become behavior billion birth rate capital investment Capital-investment cause Chapter consequences continue created crowding curve death rate decline defined depends described developed discard discussed dynamic effect environment equations equilibrium examine existing expect factor falling Figure food production food ratio forces fraction further future gives greater grow growth higher improve increase indicated industrialization influence initial land less limit LOGICAL FUNCTION loop lower material standard means mode MULTIPLIER DIMENSIONLESS natural resources natural-resource normal NREM NRUN1 occurs ORIGINAL peak person policies pollution crisis pollution ratio POLN1 POLR population possible present pressures probably processes raise rate normal reaches reduced relationship remaining represents result rise sector shortage shown shows social systems space standard of living stop structure suppressed TABLE taken tion units usage variable world system