Abstract: | The authors indicate how science and social science can be combined to assess the range and effectiveness of policy alternatives available to environmental decision-makers. They focus on cost-effective regulatory alternatives to the Los Angeles particulate sulfate problem. Both sciences are applied to the relationship of emissions to pollution levels and environmental quality. They reject the notion that a simple reduction in emissions leads to a commensurate reduction in pollution levels. The problem of applying licenses and emissions fees are reviewed, as are the difficulties of political feasibility. |