Our chanping environment. Solving environmental problems. Ecosystems and energy. Ecosystems and living things. Ecosystems and the physical environment. Major ecosystems of the world. Ecosystems, economics, andgovernment. Understanding population growth. Facing the problems of overpopulation. Fossil fuels. Nuclear energy. Renewable energy and conservation. Water: A fragile resource. Soils and their preservation. Minerals: A nonrenewable. Wildlife: our plant and animal resources. Land resources and conservation. Food resources: A challenge for agricultureAir pollution. Global changes. Water and soil pollution. The pesticidedilemma. Solid and hazardous wastes. Tomorrow's world.