The scope of environmental risk assessment has been expanded from the traditional chemical and accident assessment to the inclusion of the potential harm from artificial introduction of species, both natural and genetically modified, into an ecosystem. Thus major categories of environmental hazards include chemical, physical, biological, and/or their combinations. Environmental entities can be more complex with respect to system structure and functions, although the methodologies are largely transplanted from human health risk assessment. Environmental risk assessment processes would involve problem formulation, characterization of exposure and effects, and risk characterization. The assessment can be made retrospective or predicative, depending on the risks involved and management requirements. Thus, is it possible to implemented the dynamic system methods to risk management in order to prevent environmental damage?