The video discusses how changes in the population pyramid's structure reflect changes in a country's development, war, or other drastic events. Now, think about each line in the population pyramid as a population estimate of the number of people that will be in each age group in the future. Pick one of the countries whose population pyramid was displayed in the video and discuss what you think would happen if the estimates were off?

https://www.youtube.com/watch?v=RLmKfXwWQtE&feature=emb_logo