In human geo we learned about the death and birth rates of countries. Also we learned about the top ten countries for  life expectancy. We also learned that some of the poorest countries have the most people. In Chad you are only expected to live until you 48. In countries like Japan you are expected to live until you are 94. There are so many people on this earth that by the time my generation is 35 years old 3 billion more people will be living on this earth.