1. Explain how global human population size is expected to change during the 21st century. 2. What is the age structure of a population? What can you learn from a population’s age structure? 3. What...

1. Explain how global human population size is expected to change during the 21st century.

2. What is the age structure of a population? What can you learn from a population’s age structure?

3. What is an ecological footprint? What does the ecological footprint tell us about how the global human population is consuming resources today?