Overpopulation occurs when an organism’s numbers have exceeded the carrying capacity of their habitat. In our terms, this means that when there are not enough resources to go around, humans have overpopulated the Earth. I think it is evident that we are rapidly reaching our habitat’s carry capacity.
Every day, our natural resources become more stretched. Currently, there are water shortages in big cities in the United States such as Atlanta. There are also global shortages in China and India. According to an article in USA Today, half of humanity will be suffering from water shortages in the next 50 years. This will most likely affect the food supply, leading to food shortages as well. There is also much speculation as to when we will run out of oil. Will it be in 20 years, 50 years, or 100 years? Scientists are unsure, but either way, it will present a problem. Also, we are already beginning to overrun many of our cities’ infrastructure systems, such as is stated in Mark Sumner’s essay “Hello Doomsday, My Old Friend.”
So, just how fast are our numbers growing? Everyone probably remembers exponential growth from math class. It’s when numbers continue to double. First, you start off with a population of one, then two, then four, then 8, then 16, then 32, and so on. Population increase rates grow with the number of people. So, while it took us thousands of years to reach a population of a billion in 1804, it only took us 123 years to reach a population of two billion in 1927. Then, in only 47 years, we reached a population of four billion. There are currently 6 billion and some odd people on Earth. By 2028, if we continue to grow at our current rate, there will be 8 billion.
How is this happening? Simple reproduction. Humans are reproducing, and our children are reproducing. If each couple had two children, then they would simply replace themselves. However, even in the United States where birth control and family planning are available, the average American has two and a half children. This intimates a growing population. In other parts of the world, the amount of children born is much higher. Another factor in our growing population is medical advancement. People are living longer.
What is the solution? There is no simple solution, but there are steps we can take to stop this trend. We can make birth control more accessible to both our own citizens and other people around the world. We can continue sexual education and family planning. Another option is the more drastic method taken on by the Chinese government. We can limit the number of children a couple is allowed to have. It may seem harsh, but who wants to live in a world with food and water shortages? Finally, if we are going to continue to prolong the human lifespan, we must take the time and money to find out how we can support the larger population that will occur.
The good news is the population crisis may solve itself. It seems birth rates are dropping all over the world. In 2050, the projected number of children born per woman will be 2.05. Hopefully, that rate will continue to fall, allowing us to correct our population without harsh measures.
As for how I will support my solutions, I volunteer at the Middle Tyger Community Center in Lyman, SC. One of the programs I helped with works with pregnant adolescents. These girls get free childcare in exchange for staying enrolled in school and attending parenting classes. Statistics show teen parents are likely to have another baby as a teen but not in our program. This is my little piece of helping in the fight: education.
The picture I attached is of a UN graph of population by continent and then the world.
My statistics came from Wikipedia and http://www.cosmosmith.com/human_population_crisis.htm if anyone is interested.