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Human Population Growth Essay

1512 words - 7 pages

Globally, the growth rate per person of the human population has been declining since its increase in 1962 and 1963 which was at 2.20%. In 2009, the estimated annual growth rate was 1.1%. As of now the population of the world is at about 7,211,021,348 humans, which has gone up 4 billion people since the 60’s. Most of this growth is coming from the countries in high poverty. Rise in human population can cause problems such as pollution and congestion; these might be resolved or worsened by technological and economic changes. Over the last 100 years we have seen a fast increase in population due to medical advances and massive increase in agricultural productivity. The major fear is that high ...view middle of the document...

The main worry to people is the environmental effects and how we can fit this many people in Mother Nature. By the year 2050 we are expected to have as many as 9 billion people inhabiting the Earth. Having this many people, we would have to cut down many forest to fit us humans, which would kill off many animals and cause extinctions. As of now we have already transformed or degraded 39-50 percent of the Earth's land surface and increased atmospheric CO2 concentration by 30 percent. The environment is being impacted by two basic things. First, we consume resources such as land, food, and water, second, we emit wastes from consuming our resources, including air, water pollutants, and greenhouse gases. Some wastes, such as untreated sewage and pollutants can hurt our health. Since 1950 we humans have cleared 80 percent of rainforests, caused the loss of tens of thousands of plant and wildlife species, and have increased the greenhouse gas emissions by about 400 percent. In the world 1 billion people lack clean drinking water. With more and more people being born every day there will not be enough water for humans to consume and water to grow food for everyone. As individuals all we can do is conserve water and find new ways, like salt water treatment plants, to gain more access to clean drinking water. The other main issue is getting and keeping our water clean. 95 percent of the worlds cities still dump raw sewage in their water supplies and with that 80 percent of all health maladies in developing countries are due to unsanitary water. Other causes to unsanitiated water are all the toxins and pesticides we use for our crops and fields.
Water is not only affected with overpopulation. Our daily food would be also affected in a big way. 99 percent of our food comes from land. With overpopulation extending we take up that land used for agriculture. As of now there is one-third of cultivated land that isn’t fertile anymore. Shortage of land and productivity will cause food shortages and malnutrition across the world. According to the UN’s Food and Agriculture Organization the world will have to produce 70 percent more food by the year 2050 to feed all the people estimated to inhabit Earth.
The last thing that overpopulation effects in our environment is the air we breathe. More than 100 million Americans breathe polluted air in major cities across America. This causes cancer, lung problems, and asthma. When winds carry this pollution from city to city it creates acid rain. This poisons the earth and its waters. This can ruin top soil tremendously and kill off fish populations in the rivers and lakes. It can also affect trees and vegetation by changing the ph balance. The more people we add the more cars, factories, and transportation we need. This will make our air pollution even worse than it is, if we don’t do anything to help. Also when we cut down trees for more population we are taking away the oxygen from our trees and plants.
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