It is estimated that there are 6 billion people living on the earth right now. Our planet has a carrying capacity, which means that it only can provide valuable resources such as food and shelter for a definite amount of living creatures. The earth's carrying capacity has been known to be around 2 billion people, even though these numbers tend to vary greatly (some have determined the earth's carrying capacity to be 44 billion), we are living at a rate in which our natural resources are depleting themselves or being polluted. On top of that more and more people keep being born on this planet (as you read this paragraph, 50 more people will be born onto this world).
             Overpopulation has several impacts on earth. Environmental factors such as global warming, deforestation, extinction, and human factors like wars, starvation, fierce competition for wages have a toll not only in the planet but on the way we live. The causes for overpopulation have different roots and seem to vary from culture to culture. Education plays a very important role, educated families where both spouses have some sort of degree tend to have less children, whereas uneducated families tend to be larger. This leads us to the second factor: poverty. In rural and poor areas of the world families tend to be bigger so all of their members can work and support each other, they are also numerous because disease tends to take the life of 1 or 2 kids per poor family in an underdeveloped country. Other more delicate factors such as religion (opposing the use of contraceptives and having the idea of following the word of God by having large families) also have a mild effect on the size of the population.
             Global effects of overpopulation tend to have a great impact on humans as individuals. Crowded and dense cities make for pollution, and great competition for wages, having the effects of very little jobs or underpaid jobs. Urban factors as traffic and stress lead...