Lauren Hoff

IB Biology 11

May 19, 2004

Jensen

Over Population

On October 12, 199, the 6th billionth Homo sapien was born on planet Earth. Every population on earth has a carrying capacity, the number of organisms an environment can support. Many scientists believe that we are dangerously flirting with this line. Although we are still growing exponential, the growth rate is beginning to slow, going from 4.9 in 1960 to a year 2000 calculation of 2.6. Since we our growth rate is slowing, we are considered to be in the transitional phase of a sigmoid curve, which is right before the plateau or carrying capacity. Over population in the world is affecting many things, such as water supply, food supply, and also the amount of land. Many things are being done about this, such as in China, where the number of children allowed to one family is restricted.

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        Speaking of China, it is possibly one of the best examples of over population. It is home to over one-fifth of the worlds population, and still, only a country. When China experienced the population growth, the country had already been established, therefore, the new members of society could not expand out across the land. The people were forced to live on over crowded farm land. Also, the amount of resources available was still the same as when it was with less people. Therefore, much of the rivers, such as the Yangtze River, dry up annually from over use. Many things ...

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