Living in the Environment 18th Edition by Tyler Miller,Scott Spoolman

تمرين 27

What is the key concept for this section List four ways to reduce water pollution from nonpoint sources. Describe the U.S. successes and failures with using laws and regulations to reduce point-source water pollution. What is a septic tank and how does it work Define primary sewage treatment and secondary sewage treatment and explain how they are used to treat wastewater.