Eco-documentary, a cinematographic genre on the environment, is a media construct meant to raise environmental awareness. It exposes environmental crises and attempts to present solutions for their degradation. This book analyzes patterns of 'fear' and 'threat' in a Moroccan Eco-documentary by Amouddou production agency on the degradation of a lagoon in the North East of Morocco. In line with Witte's et al. (1996) model of 'perceived severity' and 'perceived susceptibility', and within the framework of Eco- linguistics, the book examines linguistic patterns of 'fear' and 'threat' to reinforce the argumentative process in stories and testimonies of actors. Finally, the book provides some recommendations for eco-documentary producers, institutional organs, and future research to examine unexplored facets of eco-documentaries that document damages and exploitation of the environment.