Developing countries are in a situation immensely different than that of developed countries. Fertility rates in developing countries are generally declining, but still above the replacement level (Wright 2005). Population growth occurs when the births out number the deaths. At this population momentum, even after the total fertility rate is reduced to the replacement level, enormous growth is in store for developing countries (Wright 2005).

In developed countries like the United States, it is seemly different in that a developed population profile will increase and decrease accordingly (Wright 2005). This is due to demographic changes in comparison. As populations become larger and healthier we tend to see a decline in fertility rates. Declining fertility rates in the last three decades have resulted in decreasing rate of population growth, but growth still remains steady at 2.1 percent per year which is adding 77 million per year worldwide (Wright 2005).

Population growth of developing countries, half...