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Population growth and its impact on the environment
What is the trend of human population growth
Negative effects of overpopulation
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QXT2 Task 4
Human population growth is unprecedented. Since 1950 the world’s population more than doubled and is still experiencing growth at an exponential rate. The United Nations has reported there are over 7 billion people coexisting on this planet with few if any limiting factors having a major impact on the overall growth rate. The organization also predicts by 2050, more than 9 billion people will inhabit Earth, however with this projection comes great concerns about the quality of life. It is predicted by some that the ecological services humans are the beneficiaries of will cease or be greatly strained. Exponential growth in the human population cannot continue without acknowledging the major changes that will ensue because of
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The rate of natural increase is equal to the birth rate (b) – death rate (d). Natural rates of population growth can be calculated using birth and death; however the more telling component of population growth is the longevity of a population’s members. People can attribute their longevity to better nutrition, greater access to medical care, improved sanitation, widespread immunization, more education, and more resource availability based on socioeconomic advantages.
As long as the birth rate is above the death rate a population grows. Exponential growth in populations is displayed using a J-curve. In humans each day the reproductive base gets larger, because more individuals are born than are dying. In human populations one must also take into account immigration and emigration. Certain regions of the world increase significantly by the influx of immigrants and although this occurrence does not directly increase world population totals it does shift gene pools and lends itself to more growth in one area of the world, while another area
As small mobile groups of hunter-gatherers adopted a sedentary lifestyle, they mastered both agriculture and animal domestication. These small settled groups quickly evolved into cities and towns that encompassed the entire globe. Today the estimated population of the world is over 6.2 million people.1 As the population has grown, it has had several deleterious effects on the Earth. These include climate changes, the spread of diseases, declining food production, deforestation, and environment pollution (particularly air pollution). As people have become more conscious of these harmful effects, they have begun to devise strategies to combat this problem. Among the suggested responses include a switch to renewable energy, a call for zero population growth, and adopting sustainable agricultural practices.
Life expectancy in many parts of the world has increased since 1800 (Life Expectancy by Age, n.d). To understand these changes we can study the demographic transition, the changes in birth and death rates over extended periods of time. The industrial revolution has significantly improved the conditions of humans and in 20th century death rates declined but the birth rates remained unchanged. In many of today’s developed countries both rates have declined; however, in developing countries, while death rates have declined due the improvements of living conditions, the birth rates are still high which has caused a record high population growth (HAUB & GRIBBLE, 2011).
The world’s population is rising rapidly from seven billion to the estimated nine billion in 2050 (Ellis, Overpopulation is Not the Problem). Every human being adds stress to the Earth’s resources. Numerous places like Africa and China maintain a copious amount starvation and poverty. There are days when people go without food, water, or shelter. There is even such happening in the United States. In such places, it is difficult to find contraception, or birth control, which leads to unplanned pregnancies. These situations are rooted down to overpopulation, which is when there are too many humans. However, there is a multitude of ways to reverse such negative effects. Population control is a necessary act that will benefit the world through sparing natural resources, decreasing famine, and controlling unplanned pregnancies. A worldwide effort would have to take effect in order for a successful future.
It is a known fact that the world population is increasing without bound; however, there is a debate if this increase is a good thing or if it will prove catastrophic. The article “The Tragedy of the Commons” by Garrett Hardin discusses how the ever-increasing world population will exhaust the world of its natural resources, and eliminate human’s capability for survival. On the other side of the argument is Julian L. Simon who wrote “More People, Greater Wealth, More Resources, Healthier Environment.” This article proposes the theory that with an increase in population, humans’s quality of life is amplified. One particular issue that they both mention and have drastically different views on is the future of agriculture and human’s ability to sustain it.
Overpopulation drastically affects the standard of living of the people. Not only does it affect the standard of living, it affects the environment as well. The environment has a certain carrying capacity of humans that it can support. When this carrying capacity is exceeded, the environment starts to deteriorate. With a large amount of people, land that can be used as valuable farmland is wasted. Also, with a great amount of humans, there is more waste produced. This waste contaminates local water and spreads disease, eventually leading to the destruction of wildlife. Animals as well as humans have a limited use of water because of the microorganisms and fecal matter in the water. Many ideas have been debated upon to help improve these conditions for both animals and peopl...
Population growth is the change in population over a period of time. It happens due to a number of factors such as standard of living, cultural factors, and government policies. When the standard of living become better such as the improvement of social conditions ( shelter, sanitation, clean water , health care and etc) death rate and birth rate reduce as more people become inclined to have fewer children. As standard of living increases, there will be more immigrants thus an increase in population. Government policies which encourage people to have lesser or more children also has a significant effect on birth rate too.
The human population growth rate is an alarming issue that brings with it irreversible consequences, that will likely effect the way of life for future generations to come. With the serious incline in population statistics comes catastrophic processes such as global warming and deforestation that have major ‘knock on’ ramifications. It’s issues such as these that need to be considered when we think about the growth of the human population, and we must take into account why these issues are occurring. We must also explore the options available to us that may assist in limiting the problems, or eliminating them all together, to provide a better place, not only for us in existence now, but also those who will walk this earth in the future decades and centuries to come.
This problem of population growth leads to a number of solutions that could have significant implications on the quality of life. Taking no action and allowing population to grow unchecked could possibly risk the entire human species if food or clean water were to become unavailable worldwide. Aiming for zero population growth would in theory maintain the existing quality of life since a stable population would not increase their use of resources. However not all resources are renewable, so scarcities could still occur with a fixed population size. In an extreme case permanent resource depletion under zero population growth could have the same extinction effect that unchecked growth can lead to. Despite the escalating risk of unchecked population growth, technological advances necessitated by the increase in population will at least maintain the quality of life and could possibly improve conditions.
One of the major effects of the huge population increase has been the depletion of natural resources and the destruction of ecosystems. In the 1960's, theorist Paul Ehrlich predicted that, given the skyrocketing figures of human population, the amount of food produced would not grow at a fast enough rate for human survival (Professor Carr Everbach, personal communication). He predicted mass starvation and death by the year 2000 as the result of uncontrolled population growth. Clearly, this did not occur. Ehrlich did not foresee the advancements ma...
Jacques-Yves Cousteau once said, “Overconsumption and overpopulation underlie every environmental problem we face today” (“Population,” Internet). With the current statistics, Jacques could not be more accurate. Every second, 4.2 people are born and 1.8 people die, which would be a net gain of 2.4 people per second (“Population,” Internet). At this steady rate, the environmental health is spiraling downwards, and it is safe to assume humans are responsible for this. As the population increases, harmful effects on the land, water, and air also do.
One of the problems facing our world is population. It began about ten thousand years ago when the humans settled and began farming. The farming provides more food for the people thus making the population grow. Now we are about 6 billion in population and in a few years we will be around 10 to 11 billion. Therefore, our population will almost double in size. This means that we will need more food to support us. A study in 1986 by Peter Vitonesk, a Stanford biologist, showed that the humans are already consuming about 38.8 of what is possible for us to eat. Thus, if the population keeps increasing, the percentage will increase also, making us closer and closer to the biophysical limits. By studying the earth's capacity, Dr. Cornell, another biologist, believes that we are already crowded for this would. He believes that our world can only support two million people. Not only this, but population can cause complicated problems to the countries with very high population. These countries will need more schools to educate its people, they will need more hospitals and public health to take care of their people, and they will need more water and more soil for farming to feed all the people. In order to solve the population growth problem, the people should be educated. Once the people are educated they will be aware of the problems they ca...
Human population growth is becoming a huge issue in our world today. The population is increasing rapidly. The reason that it is becoming a concern is because it has affected the economic, environmental, and social aspects of our world. In the film Frontline: Heat, we can see how there might not be a future for our planet unless we are able to reduce the emissions and make our world a safe place. Not only for the present but also for future generations so that they are able to live long and healthy lives.
Since the beginning of mankind, we have reached many great achievements. We have developed many technologies and theories to solve and explain many of our questions and to improve human life. Through our years of evolution, we have severely increased our own survivability. This has been a great achievement for us, but in the recent decade, overpopulation is becoming a great issue. In the recent years, the rapid increase in population growth has troubled many in the field of political sciences. Scientists like Ehrlich have calculated and expected our population to grow even faster if we do not act upon the increasing rate of population growth. The birth rate of our planet is increasing exponentially, meaning that the birth rate has surpassed the death rate and that the rate of growth will only increase if left alone. The politics of population is a debate that involves both the fields of sciences and moral and ethical considerations. Science may provide an insight of
Overpopulation is a growing problem all over the world. This is a very important environmental issue and needs to be dealt with. This environmental problem is affecting many countries around the world, but mostly the poor and impoverished countries that don’t have the resources to help deal with these issues. It also affects the environment like plants, animal life and air quality. When the population of people expands we need more natural resources from the environment, so we consume more than we can produce.
The reduction of the Earth's resources has been closely linked to the rise in human population. For many thousands of years people lived in relative harmony with their surroundings. Population sizes were small, and life-supporting tools were simple. Most of the energy needed for work was provided by the worker and animals. Since about 1650, however, the human population has increased dramatically. The problems of overcrowding multiply as an ever-increasing number of people are added to the world's population each year.