• Join over 1.2 million students every month
  • Accelerate your learning by 29%
  • Unlimited access from just £6.99 per month

Human population numbers - trends, causes and consequences.

Extracts from this document...

Introduction

Human population numbers - trends, causes and consequences. Human population has been developing since thousands of years. About 10,000 years ago, the human population growth remained fairly constant due to disease, famine or natural disasters. This population slowly increased for the next 9,600 years. The Black Death which occurred in the 1330's killed 25 million people between 1347 and 1352. It is also known as the bubonic plague. Since the past 400 years, the human population increases exponentially. One of the ways to calculate this increment is by referring to the doubling time. The doubling time is defined as the number of years required to double an areas' current rate of population growth. Since the 1800's, the doubling time decreased from 100 years to 60 years and finally 25 years. On the other hand, there were three major population explosions. The first one took place about 20,000 years ago due to the tool-making revolution. This was when tools were used for hunting and food-gathering techniques. The second explosion was brought about by agricultural revolution, which was about 6,000 years ago. ...read more.

Middle

Physically, there also will be a change in the population numbers. Resources play a major role in this argument. Food and energy must be enough for individuals to carry on living a fairly average life. When supply is insufficient, the number of people will decrease. Space also must be considered in monitoring the population change. In the housing aspect, if there aren't enough dwellings for people to live in, then people will die and again, population numbers will decrease. Migration also affects the population numbers. There are two types of migration, emigration and immigration. Emigration decreases the amount since people will leave the place and immigration will increase the number since people will join the community. Another uncontrollable and unpredicted factor is natural disasters. When this occurs, population numbers will lower down. Finally, the last category, biological aspect, is quite crucial. An increase in birth rate will ensure the augmentation of the population numbers. Birth rate, which is also known as natality, is defined as the number of births divided by the number of adults in the population. ...read more.

Conclusion

These include water pollution, industrial waste, air pollution, and as discussed earlier, deforestation. Desertification often follows deforestation, but that's only in calamitous cases. Greenhouse effect and acid rain are constituents of air pollution. This will cause the earth to become drier and hotter, which ultimately will be troublesome to grow crops. The final consequence will be resources. Food production will be a major problem. Resources also include metals and fossils, which are non-renewable. After using these materials, there will be insufficient supply for the future generation. When a population increases, starvation will be a major problem in that effected area. Individuals will not have sufficient supply of food. Another similar effect will be poverty. This problem will multiply to urbanisation indirectly. The rural areas will convert to urban areas. Certain unfortunate individuals will have no money to sustain life and eventually the population number will decline. Another effect is unemployment. Since there will be so many people, it will be difficult to get a job. These people, who cannot get a job will be frustrated and also can't support their families. Dipesh Remais L 106 1 ...read more.

The above preview is unformatted text

This student written piece of work is one of many that can be found in our AS and A Level Population & Settlement section.

Found what you're looking for?

  • Start learning 29% faster today
  • 150,000+ documents available
  • Just £6.99 a month

Not the one? Search for your essay title...
  • Join over 1.2 million students every month
  • Accelerate your learning by 29%
  • Unlimited access from just £6.99 per month

See related essaysSee related essays

Related AS and A Level Population & Settlement essays

  1. Geography: Causes of Famine

    Small harvest, meant there was little rice and people couldn't afford the rice. 1,500,000 died U.S.S.R 1947 Reported by Khrushchev in 1963: "their method was like this: they sold grain abroad, while in some regions people were swollen wit hunger and even dying for lack of bread Thousands died Republic Of The Congo 1960-61 Caused by civil war.

  2. Analysis Of Brazil's Migration Trends

    If people are moving out and in of villages at a steady rate because people want better jobs in the urban areas and people move in for retirement then this could cause a lack of jobs being taken up. North-South People move from the north to south because there are

  1. An Overview of Immigration to Australia

    In 1993-97, New Zealand (13.0%) was higher than United Kingdom. Also, Asian born settler arrivals took place European arrivals gradually. In 1993-97, Asian born settler arrivals ranked high: China 3rd (7.0%), Viet Nam 4th (5.1%), Hong Kong 5th (4.8%), and Philippines 6th (4.2%).

  2. Geography revision - flooding - Urbanisation - Population problems

    Since 1901, the population has doubled to 3,104 people. Problems: () Infilling, more building of different styles, crowd the area, and make it look less attractive, upsetting original residents as open spaces are used. () Most people shop in Exeter of Exmouth so there are less services in the village than in 1935.

  1. Theories of population.

    One hopeful sign for the new millennium is that population growth is slowing significantly. Current population projections suggest the possibility that world population could peak earlier and at a lower level than indicated by the projections of the past. Such an outcome, however, will require that family planning and related

  2. Fox Hunting

    This, some say, hardly deserves comment. They feel that the relentless chasing of on innocent animal for many miles (its burrow is often specially blocked). Until it is weak and tired, and then, setting upon it with dogs is clearly no sport to any one but the mildly insane.

  1. Global Community and Immigration in the United States

    In addition to social science research, common sense suggests that greater disparities in income create greater social distance between society's members and thus will have a negative impact on political and social harmony." (Camarota -Care) Exacerbation of Social and Economic Problems Arguably there are both positives and negatives to the

  2. Does a population hierarchy exist on the Ards Peninsula?

    We can now see more clearly the settlements grouped together according to the size of their populations and what significance this has to my main hypothesis. This graph shows a step by step arrangement, which the settlements follow. It shows that the top ten settlements by population are spaced out

  • Over 160,000 pieces
    of student written work
  • Annotated by
    experienced teachers
  • Ideas and feedback to
    improve your own work