In this lesson, our instructor Bryan Cardella gives an introduction on materials management. He discusses the importance of resources, mineral resources, mineral development, materials management and waste, integrated waste management, solid waste management, landfills, legislation and waste reduction in landfills, hazardous waste, alternatives to land disposals, ocean dumping, and electronic waste.
Resources are considered renewable or non-renewable. In order to preserve our limited resources as long as possible: eliminate subsidies for virgin materials, establish “green building” incentives, provide financial rewards for sound practices (and penalties for offenders)
Mineral resources include ore deposits (like silica, zinc, copper, iron, etc), and sedimentary processes/weathering have to do with how we get access to these precious substances
The question of how much of minerals remain is a good one, especially because resources and reserves are very different. The need/use of minerals has a lot to do with the demand for extraction
Impacts of mineral development are environmental and social, and we need to do what we can to minimize the impact
The resource cycle traces minerals from their formation/origin, through extraction, through refining, through use, and then recycling/disposal
Management of the mineral wastes is important, and the eventual goal is zero waste production!
Integrated Waste Management (IWM) involves a set of management alternatives that include reuse, reduction, recycling, composting, landfills, and incineration
Municipal solid-waste management involves open dumps, sanitary dumps, composting, and incineration
Site selection and monitoring are important to consider with landfills, and there is plenty of legislation regarding how to properly maintain them
Hazardous waste is a major issue considering the U.S. alone produces more than 700 million metric tons of it per year. The story of Love Canal, NY is a classic example of the dangers of unregulated, illegal dumping. The RCRA and CERCLA were important pieces of legislation to deal with this problem
Ocean dumping is also a huge problem leading to death/retarded growth of organisms, reduction of oxygen levels, and eutrophication. It also harms the microlayer at the top of the ocean. There is a large “plastic island” in the middle of the Pacific Ocean as a result of unregulated and irresponsible ocean dumping
Electronic waste (e-waste) has been a bigger problem recently with the increased use and disposal of electronic devices like cell phones and personal computers. We can do a better job of recycling/reusing the parts
Pollution can be prevented: purchase only what is needed, control manufacturing to reduce waste, substitute nontoxic materials for toxic ones, improve engineering related to pollution
Lecture Slides are screen-captured images of important points in the lecture. Students can download and print out these lecture slide images to do practice problems as well as take notes while watching the lecture.
This book includes a comprehensive review of the key AP Environmental Science concepts and targeted strategies for acing every section of the exam. Additionally, the book includes two full length practice tests with full answer explanations.
This book is an updated manual that offers a brand-new diagnostic test to pinpoint the test taker's strengths and weak areas, two full-length practice exams with all questions answered and explained, a detailed review of all test topics, supplemented with practice questions and quizzes with answers, an overview of the test plus helpful test-taking strategies, and hundreds of diagrams and illustrations .