Population Pyramid

Today in class we talked and learned about the population pyramid. The population pyramid is basically a way of predicting or estimating whether the future population will increase or decrease based on measuring the current population a certain way. The way that this pyramid can give you an accurate depiction of future populations is by breaking the current one into three categories. The first is pre-child bearing years, the second is child bearing years, and the third is post-child bearing years.  This is very efficient. For example, over time Japan's population is going to decrease, we know this because right now a large percent of their population is aged fifty or over. This can work for any country is how we learn about the future of people. The pyramid does not give any information about life expectancy, birth rates, or death rates and can be altered by industrialization, natural disasters and, the education of many more women but it is how we know where countries are headed.