Environmental ethics, like few other areas of ethics, deals with fundamental questions of philosophy (philosophy of nature, anthropology, political philosophy) while also touching on various policy fields (climate policy, nature conservation, agriculture and forestry, etc.). The tension between foundational reflection and political relevance is maintained through argumentative justifications of environmental, animal, and nature protection, which are core areas of environmental ethics. The handbook presents the discourse of environmental ethics in terms of its terminology, history, ethical foundations, essential fields of action, and connections to neighboring sciences.