The pursuit of truth is of crucial importance in environmentalism. How can we establish shared realities that encompass biodiversity loss, climate change, and pollutions that disrupt essential ecosystems? Taking signs and repetitions as a point of departure, Eva Lilja and Mona Lilja suggest a range of basic communicative practices that could be the foundation of a semiotics of sustainability. Their book aims for an in-depth exploration of eco-strategies and expands on how we could – perhaps even should – communicate sustainability issues. Homing in on problems related to communication, Making Truthprobes into the role of signs, the importance of reality effects, repetitions, scripts, emotions, and strategies of (de)politicization.