The environmental challenges facing humanity in the twenty-first century are not only acute and grave, they are also unprecedented in kind, complexity and scope. Nonetheless, or therefore, the political response to problems such as climate change, biodiversity loss and widespread pollution continues to fall short. To address these challenges it seems clear that we need new ways of thinking about the relationship between humans and nature, local and global, and past, present and future. One place to look for such new ideas is in poetry, designed to contain multiple levels of meaning at...