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Since 19 century the population expectancy increased, due to the better health care, food and housing, make the world population grew enormously. Now, about 4600 million people inhabit the earth, every week 1.6 million children are born. That means, by the end of the century, there will be 6200 million people in the world. This will cause food storage, unemployment, housing problem, etc. This is why governments of countries have to find ways to slow down the population. Now, let me introduce the solutions that the governments do and what you can help to reduce the effects of over-population.
-Population Control (One-Child Policy)
-Ways to reduce the effects of the environment