| Directions: The Problem of Human Population World |
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范文：
It has been estimated that a thous奂┩她䱦왖䪯閉http://bulo.hjenglish.com/myfeed/©版权所有沪江网閉䪯왖䱦她┩奂and years ago there were less than 400 million people on earth. However, in the recent thousand years human population has increased nearly 20 times. Nowadays the world population has reached more than 7000 million. The population explosion has caused many problems. Generally, they come down to four major ones.
First, a lot of people can't get employment, which is a universal problem in the world. Second, in developing countries there are not enough shelters for too many people and so people are not properly housed �䇗쪜畈�审http://bulo.hjenglish.com/event/©版权所有沪江网审�畈쪜䇗�and even are exposed to the elements. Third, in underdeveloped countries a lot of people suffer from hunger because of food shortage, which in turn causes many other problems, malnutrition, disease, etc. Fourth, there are not enough schools for so many people and so a lot of people are illiterate.
Therefore, to eliminate these problems, human beings should take effective measures to control population.
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