This book is the first book devoted entirely to Hughes as an environmental activist and writer. Drawing on the rapidly-growing interest in poetry and the environment, the book deploys insights from ecopoetics, ecocriticism and Anthropocene studies to analyse how Hughes's poetry reflects his environmental awareness. Hughes's understanding of environmental issues is placed within the context of twentieth-century developments in 'green' ideology and politics, challenging earlier scholars who have seen his work as apolitical. The unique strengths of this book lie in its combination of cutting-edge insights on ecocriticism with extensive work on the British Library's new Ted Hughes archive. It will appeal to readers who enjoy Hughes's work, as well as students and academics.