In the meantime, significant impacts could be occurring, virtually undetected.Ī high degree of uncertainty exists in the assessment of the potential effects of ozone (O₃) pollution on agricultural crop yield. A primary constraint associated with generation of adequate data from experiments is that environmental research is expensive, and conclusive results may take several years to obtain. Uncertainty is a phenomenon that cannot be avoided in the assessment of environmental impacts, due to the inherent stochasticity of environmental systems, as well as a lack of adequate empirical data related to specific cause and effect relationships. Environmental policy makers are required to make decisions under uncertainty regarding the benefits and costs of specific regulatory action.
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