World Dynamics1971 |
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Page 5
... needed for adequate nourishment . For example , if there are 2 agricultural land units per person , the corresponding point on the curve shows a food ratio of 1.0 , which is just sufficient . At 4 units of land per person , the food ...
... needed for adequate nourishment . For example , if there are 2 agricultural land units per person , the corresponding point on the curve shows a food ratio of 1.0 , which is just sufficient . At 4 units of land per person , the food ...
Page 6
... needed . The figure relates a physical variable ( land per per- son ) to a satisfaction or quality of life concept ( adequacy of food supply ) . In a larger system , food ratio would be a factor in determining birth rate and average ...
... needed . The figure relates a physical variable ( land per per- son ) to a satisfaction or quality of life concept ( adequacy of food supply ) . In a larger system , food ratio would be a factor in determining birth rate and average ...
Page 57
... needed for 63 % of any existing pollution to disappear . It represents the same concept as the half - life of atomic decay which is the time for half of the material to disintegrate . A pollution ratio POLR of 1 represents the ...
... needed for 63 % of any existing pollution to disappear . It represents the same concept as the half - life of atomic decay which is the time for half of the material to disintegrate . A pollution ratio POLR of 1 represents the ...
Contents
Introduction | 1 |
Structure of the World System | 17 |
A World Model Structure and Assumptions | 31 |
Copyright | |
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1970 conditions accumulation agricultural land assumed assumptions behavior birth rate normal birth-control program BRFM BRMM BRN1 capital investment CAPITAL UNITS CAPITAL UNITS/PERSON CAPITAL-INVESTMENT DISCARD capital-investment multiplier capital-investment ratio CAPITAL-INVESTMENT-IN-AGRICULTURE FRACTION cause Chapter CIAF CIGN1 Club of Rome coefficient computer model crowding ratio curve death rate normal decline DRFM dynamic ECIR effect effective-capital-investment ratio equations equilibrium exponential growth food production food ratio food supply FPMT FRACTION/YEAR in-agriculture fraction increase industrialization INTERPOLATION limit LOGICAL FUNCTION material standard mental models MULTIPLIER DIMENSIONLESS natural resources natural-resource Natural-resource-usage rate negative loop NR=N NREM NREMT NRUN1 POLN1 POLAT POLCM pollution absorption pollution crisis pollution-absorption population and capital population density PRESENT ORIGINAL pressures ratio CIR RATIO DIMENSIONLESS result rise Section sector shortage social systems SQUARE KILOMETERS standard of living system levels TABHL TABLE LOOK TIME.K tion units per person UNITS/PERSON/YEAR UNITS/YEAR usage rate variable world model world population world system