The field of environmental studies integrates many disciplines in the study of our environment. It includes some fo the most important applied topics of modern civilization as well as some of the oldest philosophical concerns of human beings -- that is, the nature of our relationship to our surroundings. Both applied and basic aspects require a solid foundation in the natural sciences (including biology, geology, geography, oceanography, soil science, hydrology and climatology). We must also be aware of the cultural and historical context in which we make decisions about our environment and understand the ways in which choices are made and implemented. Thus, the field of environmental studies integrates the natural sciences with environmental ethics, environmental economics, environmental law, and planning. Environmental Studies: The Earth as a Living Planet attempts to examine the entire spectrum of relationships between people and environment. Because this text is an introduction to environmental studies, you do not need any prerequisites in the sciences or humanities.