Pierre André, Ph. D. (Biology), conceived the book and is its main author. He is professor in human environment with the Geography Department, Université de Montréal. He has been teaching impact assessment since 1984, and is an active member of different associations for impact assessment. - Claude E. Delisle, Ph. D. (Biology), is a retired professor from the Civil, Geological and Mining Engineering Department, Ecole Polytechnique de Montréal.
He has been teaching about project environmental impact studies since 1977. - Jean-Pierre Revéret, D. E. A. (Applied School), Ph. D. (Economics), is professor at the Institute of Environmental Sciences, Université du Québec à Montréal. He has studied and provided training in several African countries and Eastern Europe.