Environmental Science 15th Edition by Scott Spoolman,Tyler Miller

تمرين 22

List ways to reduce water pollution from (a) nonpoint sources and (b) point sources. Describe the U.S. experience with reducing point-source water pollution and list ways to improve such efforts. What is a septic tank and how does it work? Explain how primary sewage treatment and secondary sewage treatment are used to help purify water. How could we improve conventional sewage treatment? What is a composting toilet system? Describe John Todd's use of living machines to treat sewage. Explain how wetlands can be used to treat sewage. List six ways to prevent and reduce water pollution. List five things you can do to reduce water pollution. What are this chapter's three big ideas ? Explain how the three scientific principles of sustainability can guide us in using water resources more sustainably and in reducing and preventing water pollution.