We know that the world population is growing, but not in the developed world. 95% of the world's population growth has been in third world countries. Many don't have any sanitary place for these people to live in. You may think that this does not concern me or why should I care? The reason why this concerns us is because of all the animals displaced by the expansion of the humans in the area. This animals then have to move to another place to feed and raise their young, this would then cause competition for food with the animals already there.
Now that you see that the growth rate of these places are causing things in the environment to change for the worst. From Biology we know that competition and survival of the fittest will cause something to come along and start a chain reaction that will start killing things off. If people see that the world is being damaged by over population of an area then, we might realize that one area can only help the people for so long.
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