22 pages., via online journal., Identifying and communicating uncertainty is core to effective environmental
assessment (EA). This study evaluates the extent to which uncertainties are considered
and addressed in Canadian EA practice. We reviewed the environmental protection
plans, follow-up programs, and panel reports (where applicable) of 12 EAs between
1995 and 2012. The types of uncertainties and levels of disclosure varied greatly.
When uncertainties were acknowledged, practitioners adopted five different
approaches to address them. However, uncertainties were never discussed or
addressed in depth. We found a lack of suitable terminology and consistency in how
uncertainties are disclosed, reflecting the need for explicit guidance, and we present
recommendations for improvement. Canadian Environmental Impact Statements are
not as transparent with respect to uncertainties as they should be, and uncertainties in
EA need to be better considered and communicated.
