This is the Ch 20 Reading Guide that corresponds with the textbook "Living In the Environment" by Miller and Spoolman, 16th edition.
Each reading guide requires students to interact with their textbook as they learn key concepts for AP Environmental Science. These will also act as study guide for the entire course and for AP Exam.
Ch 20 is included in this download. All of the other chapters are posted for sale for $3 each. Ch 1 and 2 are free.