The words ‘nature’ and ‘environment’ have different senses and referents. The idea of the environment is keyed to what surrounds us, and we can speak of natural and built environments as well as others. This book is concerned with ethical questions about the environment. Many of these concern problems that occur at different scales and cause harms of various types. Environmental problems can be viewed from technological, economic, religious, and aesthetic perspectives, among others. No single perspective provides the sole correct or exhaustive way of viewing environmental problems. There is an ethical dimension to most environmental problems and that is the focus of this book.