about the world today

Today in class we talked about the world. The world's population today is over seven billion people. The population is increasing by 77 million per year. 90% of the world's population takes place in the developing countries such as Africa, South and East Asia, and Latin America. The life expectancy is the average number of years to be lived by a group of people born in the same year. Males born in this year are approximately  going to live to be about 76 and women are going to live to be about 81. The average age between men and women is about 78 years. We also talked about the net migration rate in the world today. The net migration rate is the difference between the number of people entering and leaving the country during a year. In the U.S today the net migration rate is 3.62, there are 49 other countries that have a higher net migration rate. People migration for many different reasons. Some examples are: civil war, environmental degradation, unemployment, religious or ethnic persecution, better economic opportunity, religious freedom, and those are just a few of the reasons. Another thing we talked about was total fertility rate which is the average number of children born per women. If the rate is higher then 2.1, the population with rise. if it is lower than 2.1 it will fall.