P8507 Air 10-12 $49.95 Air examines the environmental threat to the thin band of life-supporting oxygen in the atmosphere around Earth, as first-world and developing world issues are debated. Learners study the treatment of emissions from coal-burning plants and look at the effect of fossil fuels on the air. This episode also highlights the application of stationary and mobile fuel cell technology. Also Available on DVD P8501 Delicate Balance, The: Part One 10-12 $49.95 The Delicate Balance—Part I investigates the origin of the current global environmental crisis, reviews environmental science from a historical perspective, and introduces the concept of sustainability. Also Available on DVD P8502 Delicate Balance, The: Part Two 10-12 $49.95 The Delicate Balance—Part II continues the opening lesson by looking at the role of population and the challenge of merging environmental and economic sustainability. Also Available on DVD P8505 Ecology 10-12 $49.95 Ecology examines a number of primary environmental concepts: the carbon cycle, the hydrologic cycle, and the food chain. Learners visit a man-made ecological habitat, and hear from its scientists. Also Available on DVD P8503 Force of Law, The 10-12 $49.95 The Force of Law looks at the way in which environmental laws are promulgated and enforced, and features interviews with legislators, lobbyists and scientists representing a wide range of viewpoint. Also Available on DVD P8509 Hazardous Materials 10-12 $49.95 Hazardous Materials surveys the use of hazardous substances and the ramifications of their illegal disposal into the environment. Also Available on DVD P8504 Health Effects of Hazardous Materials 10-12 $49.95 Health Effects of Hazardous Materials considers how chemicals that enter the environment can adversely impact human health, with toxicologists narrating two case studies that illustrate how science can discover the cause of some puzzling illnesses. Also Available on DVD P8510 Occupational Safety and Health 10-12 $49.95 Occupational Safety and Health depicts the struggle to improve workplace safety by looking at coal miners, scientists developing rocket engines, an industrial hygienist at a Boeing facility, and an OSHA safety inspection at a machine shop. Also Available on DVD P8506 Paths of Pollution 10-12 $49.95 Paths of Pollution defines and explains the four mediums—air, water, soil and biota (living material)—and presents a case study that demonstrates their interaction. Also Available on DVD P8513 Sustaining the Earth 10-12 $49.95 Sustaining the Earth introduces a trend setting chain of factories in Denmark that use waster from one industry as raw material for another (industrial symbiosis). Views will visit eco village in Itahaca, New York. Also Available on DVD P8511 Waste: Part One 10-12 $49.95 Demonstrates how the world's largest landfill in New York City copes with 13,000 tons of solid waste each day, introduces the concept of materials recycling, environmental justice, and explores the challenges presented by military-generated (WIPPS) nuclear waste. Also Available on DVD P8512 Waste: Part Two 10-12 $49.95 continues the exploration of such issues as environmental justice, the importance of materials recycling, and the problems of civilian nuclear waste, DDT and other hazardous waste materials. Also Available on DVD P8508 Water 10-12 $49.95 Water explores the international ramifications of water-related pollution problems, and explores the hardships and health risks caused by mismanagement of this precious resource. Also Available on DVD