System simulation to test environmental policy: DDT

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Abstract
An example has been given showing how system simulation can be used to arrive at conclusions of use to policymakers about the future consequences of current actions even in the case where complete information about the system is not available. The particular example studied is the general movement of DDT in the global eco‐system. The results suggest that, even if DDT usage were stabilized or decreased in 1972, the concentration of DDT in fish would continue to rise for another 2–50 years depending on the specific form of the DDT abatement policy.