World DynamicsThe "system dynamics" approach to economics as developed at MIT. |
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Page 75
... Pollution 2020.- 00 CQ NRUN1 ' ' PRESENT .2500 ' ORIGINAL 1.000 ' Population ' 2060 .. The effect of reducing the demand for natural resources is to take one layer of restraint off the growth forces ... pollution crisis . Limits to Growth 75.
... Pollution 2020.- 00 CQ NRUN1 ' ' PRESENT .2500 ' ORIGINAL 1.000 ' Population ' 2060 .. The effect of reducing the demand for natural resources is to take one layer of restraint off the growth forces ... pollution crisis . Limits to Growth 75.
Page 80
... pollution crisis develops . The number of people dying per year doubles between 2030 and 2050. About year 2060 the birth rate drops to a very low value , partly because the population itself has fallen to a small fraction of its maximum ...
... pollution crisis develops . The number of people dying per year doubles between 2030 and 2050. About year 2060 the birth rate drops to a very low value , partly because the population itself has fallen to a small fraction of its maximum ...
Page 96
... pollution crisis reappears . In Figure 4-5 the pollution crisis occurred because natural resources were depleted slowly enough that population and industrialization exceeded the pollution - absorption capability of the earth . Here in ...
... pollution crisis reappears . In Figure 4-5 the pollution crisis occurred because natural resources were depleted slowly enough that population and industrialization exceeded the pollution - absorption capability of the earth . Here in ...
Contents
Introduction | 1 |
Structure of the World System | 17 |
A World Model Structure and Assumptions | 31 |
Copyright | |
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1970 conditions assumed assumptions behavior birth rate normal birth-control program BRFM BRN1 capital investment CAPITAL UNITS CAPITAL UNITS/PERSON CAPITAL-INVESTMENT DISCARD capital-investment ratio CAPITAL-INVESTMENT-IN-AGRICULTURE FRACTION Chapter CI=C CIAF CIGN1 Club of Rome computer model crowding ratio curve decline DRFM ECIR effect effective-capital-investment ratio environment equations equilibrium exponential growth food production food ratio food supply FPMT in-agriculture fraction increase industrialization INTERPOLATION Limits to Growth LOGICAL FUNCTION Main Street Cambridge material standard mental models MULTIPLIER DIMENSIONLESS natural resources natural-resource Natural-resource-usage rate negative loop NR=N NREM NREMT NRUN1 POLN1 physical limits physical stress POLAT pollution absorption pollution crisis pollution-absorption population and capital population density PRESENT ORIGINAL pressures processes QL-Q ratio CIR RATIO DIMENSIONLESS rise Section sector shortage social stress social systems standard of living structure system levels TABHL TABLE LOOK tion units per person UNITS/PERSON/YEAR UNITS/YEAR usage rate variable world model world population world system