The final chapter analyses Robinson’s multiple award winning Mars trilogy. It considers cybernetic themes in conceptions of terraforming and biospheres, and synthesises two related concepts, Jed Rasula’s “composting” and Thierry Bardini’s “junk,” to characterise the ramified dialogism of terraforming narratives. It explores pastoral images of the garden and, through Simon Hailwood, brings to bear Nagel’s notion of intersubjectivity and the process of “stepping back” to account for the change of perspective toward the natural world experienced by various characters. This section continues with a discussion of the relationship between science and nature and its implications for environmental philosophy and science fiction before ending with reflections on how terraforming narratives combine myth, science, politics, social inquiry and aesthetics to explore human relationships to their environments.