Public concern about the impacts of economic activity on the environment and human health has gradually drawn policymakers' attention to the need to establish an environmental management framework that can properly address these issues. Actual environmental management practices are determined by a complex set of interactions between policymaking, regulations, and institutions. The priority-setting process of policymaking is supported by science and economics which help to understand the relationship between economic activities and their environmental impacts, and help to assess the comparative risks posed by various environmental outcomes.