You are not alone

You are not the only one living in this universe. You are not the only one living in Solar system. You are not the only one living in the Earth. You are not the only one living in your country.
Human population is increasing every day, every hour, every minute, every second. We are getting more crowed overtime. Eventually, the increase of population is no more beneficial, instead, becomes a problem called OVERPOPULATION.
Many articles have been published and discussed. These are 3 articles that basically have the same idea:

http://www.conserve-energy-future.com/causes-effects-solutions-of-overpopulation.php

http://www.huffingtonpost.com/alon-tal/overpopulation-is-still-t_b_3990646.html

http://www.buzzle.com/articles/causes-of-overpopulation.html

In short, there are 2 causes for overpopulation: Advance in technology and Lack in family planing. Advance in technology, such as medical facilities, decreases death rate, keeping people live longer and healthier. Lack in family planing means that parents have children in a "spontaneous" way, without any plan, rapidly increasing birth rate. These 2 factors together increase the total population.
Effects of overpopulation are obvious: depletion of natural resources, pollution to environment, massive unemployment, etc.
Some solutions are improvement in (sex) education, family planning, tax, etc.
Those ideas are obvious, and people talk about them over and over, right? What truly makes me think, however, is the idea presented in this article:

https://www.fightaging.org/archives/2006/09/overpopulation.php

This article really brings out a completely new and interesting about overpopulation. The author states that advance in technology and wealth will actually reduce birth rate. For example, in Japan, the population growth rate is negative. They have machines that can replace workers; therefore, they do not need to have more children since they have enough wealth, and also giving birth is the most difficult task (you know what I mean). The second point the author makes is that the Earth is capable to support ten billion people. That argument, to me, is quite weak: just because the Earth is capable, we do not have to push to the limit. The third point is that natural resource depletion is a result of corruption, ignorance, and greed. This is true to some degree. What bother me is that to fight against corruption, ignorance, and greed (which are human natures), we need better education, which cannot be provided efficiently with a large number of people. Overpopulation, therefore, has a indirect relationship with the depletion of natural sources.
Above are both sides of a coin named overpopulation. It's up to you to decide your belief. It is fine if you see overpopulation is not a serious issue. However, if you are worried about overpopulation, which I personally predict will get more serious if nothing is done, I gave you the solutions. Be smart...