Population growth and explosion pdf

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population growth and explosion pdf

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The world population explosion: causes, backgrounds and projections for the future

Not a MyNAP member yet? Register for a free account to start saving and receiving special member only perks. This brief statement of population problems indicates the pervasive and depressive effect that uncontrolled growth of population can have on many aspects of human welfare. Nearly all our economic, social, and political problems become more difficult to solve in the face of uncontrolled population growth. It is clear that even in the wealthier nations many individuals and families experience misery and unhappiness because of the birth of unwanted children.

The desirability of limiting family size is now fairly generally, though not universally, recognized, particularly among the better-educated and culturally advanced segments of the population in many countries. Effective voluntary control of family size essentially depends upon the successful interaction of two variables: level or intensity of motivation and the availability and utility of procedures.

When motivation is high and sustained, difficult procedures for controlling fertility can be used successfully, but when motivation is weak and erratic, simple procedures that impose few demands are essential. Quite obviously any comprehensive program for solving population problems must work with both these variables, must seek to enhance motivation and also to improve procedures for voluntary control of fertility.

A broadly based effort to develop clearer understanding of the physiology and biochemistry of the reproductive process is a primary requirement. Work in this area can be effectively strengthened by expansion and coordination of the activities of the few existing laboratories now devoted to basic problems of human reproduction.

There is a parallel need—no less important—for extensive, systematic application of new basic knowledge in the development of new techniques, procedures, devices, and medically active compounds for the regulation of fertility. Inherent in this requirement is the necessity for assurance of safety in techniques and procedures, and freedom from undesirable side-effects from compounds and treatments.

These objectives require extensive studies in chemistry, physiology, and biochemistry, with large animal colonies and clinical facilities for large-scale animal and, subsequently, human tests. The limited field surveys and experiments reported upon in this document must be enlarged, and new projects of this kind undertaken on a continuing basis in many more parts of the world, making effective use of growing bio-medical knowledge and newly developed devices, techniques, and compounds.

The objectives of these projects should be two-fold: 1 to determine the advantages and disadvantages of various techniques, procedures, and devices, and 2 to determine the degree and scope of their acceptability in various societies, cultures, and economies.

To reach the objective, the means must be provided and they must be accepted and used. We believe that the implementation of the recommendations in this report will lead to substantial increases in our effective knowledge and will also encourage the use of this increased knowledge in a successful attack on the many problems of rapid and uncontrolled population growth.

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The world population explosion: causes, backgrounds and projections for the future

Human overpopulation or human population overshoot refers to a human population that is too large to be sustained by its environment in the long term. The idea is usually discussed in the context of world population , though it may also concern regions. Human population growth has in recent centuries become exponential due to changes in technology that reduce mortality. Experts concerned by this trend argue that it results in a level of resource consumption which exceeds the environment's carrying capacity , leading to population overshoot. The subject is often discussed in relation to other population concerns such as demographic push , depopulation , ecological or societal collapse , and human extinction.

Read this article to learn about the causes, characteristics and explosion of population growth! The growth in human population around the world affects all people through its impact on the economy and environment. Image Courtesy : digitaljournal. The current rate of population growth is now a significant burden to human well-being. Understanding the factors which affect population growth patterns can help us plan for the future. The fall in death rates that is decline in mortality rate is one fundamental causes of overpopulation. Owing to the advancements in medicine, man has found cures to the previously fatal diseases.

Overpopulation or overabundance occurs when a species' population becomes so excessive that people deem it must be managed. It can result from an increase in births fertility rate , a decline in the mortality rate , an increase in immigration , or a depletion of resources. When overpopulation occurs the available resources become too limited for the entire population to survive comfortably or at all in long term. In ecology , overpopulation is a concept used primarily in wildlife management. As such, overpopulation is thus characterised by an increase in the diseases and parasite-load which live upon the species in question, as the entire population is weaker. Other characteristics of overpopulation are lower fecundity, adverse effects on the environment soil, vegetation or fauna and lower average body weights. Ironically, where ecologists were preoccupied with conserving or augmenting deer populations only a century ago, the focus has now shifted in the direct opposite, and ecologists are now more concerned with limiting the populations of such animals.

The world population explosion: causes, backgrounds and projections for the future

Human overpopulation or particularly human population overshoot refers to a human population being too large in a way that their society or environment cannot readily sustain them. It can be identified with regional human populations, but is generally discussed as an issue of world population. Overpopulation is argued to be the cause, due to demographic pressure, of overconsumption and subsequently overshoot.

Not a MyNAP member yet? Register for a free account to start saving and receiving special member only perks. The value placed upon large families especially among under-privileged rural populations in less developed countries who benefit least from the process of development , the assurance of security for the elderly, the ability of women to control reproduction, and the status and rights of women within families and within societies are significant cultural factors affecting family size and the demand for family planning services.

COMMENT 5

  • Next, the mechanisms behind unprecedented population growth are explained and plausible scenarios for future developments are discussed. Orville L. - 26.04.2021 at 19:03
  • PDF | The rapid increase of human population is putting an incredible strain on our environment. While developed countries continue to pollute the | Find, read​. Hydtorrpurna1998 - 30.04.2021 at 07:14
  • At the beginning of the nineteenth century, the total world population crossed the threshold of 1 billion people for the first time in the history of the homo sapiens sapiens. LГ©on S. - 30.04.2021 at 14:39
  • Persons are means as well as ends of economic development. Seth K. - 03.05.2021 at 10:16
  • The human popula-tion will increase by 1 billion people in the next decade. This is like adding the whole population of China to the world's population. The growth​. Meconchiewer - 04.05.2021 at 15:25

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