This chapter introduces the scope and principal topics of the book by posing big questions for readers, individually and collectively. What are the major environmental problems we face? What are our fundamental values and how do they affect our attitudes concerning the environment? What makes ethics particularly relevant to questions of how we humans inhabit and manage our environments? What should be done – and by whom? What behaviours and practices have to change and how should this be accomplished? What ethical issues are raised by the proposed solutions? How can these insights be combined and applied successfully, and where do they lead?