Problem
1. What does the Millennium Ecosystem Assessment Report say about human activities?
2. Provide one example of natural pollution and one example of human activity pollution.
3. Give at least three reasons why many people around the world have an improved quality of life.
4. What is the tragedy of the common?
5. What is the difference between point source and nonpoint source pollution?
6. What is the difference between the ecological footprint model and the IPAT model?