Rapid human population growth has a variety of consequences.Population grows faster in the world’s poorest countries. High fertility rates have been strongly correlated with poverty.Overpopulation causes the lack in food, water, education, heath, service,employment… We need more jobs when the population increases.And when we cann’t creat enough job,the unemployment will increase and it causes the poverty. In the USA one in eight Americans lare below the official poverty line.A third of the population is living at or below the poverty line. Poverty will reduce human beings to a low level of existence.With the overpopulation,we will do not enough land for them,so they have to destroy forest. Poor health will decrease the ability of the poor to work and put them deeper into the poverty. With a low education foundation,they will not regconize fully about the affects of having more children.Many couples wish to limit family size,but lack the information. The end of World War 2 causes the development of the population in some countries.With many years in war,these countries were detroyed heavy,and the people in these countries had to live in the low basic.It causes the poverty in these countries. Rich and poor countries are affected by population growth.Goverments need to outline the sound policy about the fertility rates in each countries to control the increasing of the population.At the present growth rates, the population will more and more increase with a high speed and one day we will have not enough to stand.Thanks for your attentions.