1. Key Terms Replacement Rate: a fertility rate of 2.1. Two children per family are required to replace each parent. The.1 is needed to overcome the deaths of some children. Dependency Ratio: population ratio based on age that describes those too young or too old to be in the work force.

2. Case Study: Japan Population Density and Aging Population

9. Japan Population Infographic Tokyo Wave Pool Capsule Hotels Train Stuffing Videos

10. Case Study: Germany Negative Population Growth

11. Germany's Demographic Decline

12. Case Study: China One Child Policy Suffering Caused by China's One Child Policy