Chapter 19: Study Questions 7, 9, and 10 (on page 475 of your text)
Q7) Describe the major steps in wastewater treatment (primary, secondary, advanced). Can natural ecosys-tems perform any of these functions?
Q9) How does water that drains from coal mines become contaminated with sulfuric acid? Why is this an important environmental problem?
Q10) What is eutrophication, and why is it an ecosystem effect?
Chapter 21: Study Questions 2 and 8 (on page 549 of your text)
Q2)
What are the differences between primary and second-ary pollutants?
Q8) Discuss the processes responsible for stratospheric ozone depletion. Which are most significant? Where? Why?
