Botkin & Keller- 8th Edition Chapter #1- Key Themes in Environmental Sciences Guided Reading Name: _____________________________________ Due Date: __________________ 1. What does the Amboseli Case study illustrate about environment science? The Amboseli story illustrates that many environmental factors operate together, and that causes of change can be subtle and complex. 2. Why do estimates of how many people the planet can support range from 2.5 billion to 40 billion? Explain. The answer depends on what quality of life people are willing to accept. Beyond a threshold world population of about 4?6 billion, the quality of life declines. How many people the Earth can sustain depends on science and values and is also a question about people and nature.