Key themes in environmental sciences -- Science as a way of knowing : critical thinking about the environment -- The big picture : systems of change -- The human population and the environment -- Ecosystems : concepts and fundamentals -- The biogeochemical cycles -- Dollars and environmental sense : economics of environmental issues -- Biological diversity and biological invasions -- Ecological restoration -- Environmental health, pollution, and toxicology -- Agriculture, aquaculture, and the environment -- Landscapes : forests, parks and wilderness -- Wildlife, fisheries, and endangered species -- Energy : some basics -- Fossil fuels and the environment -- Alternative energy and the environment -- Nuclear energy and the environment -- Water supply, use and management -- Water pollution and treatment -- The atmosphere, climate, and global warming -- Air pollution -- Urban environments -- Materials management -- Our environmental future.