Ecology and Overpopulation Essay Example | Topics and Well Written Essays - 1750 words

Ecology and Over tribe - Essay Example rattling in the course of history in process of development of productive forces, the sizes of the territory prerequisite for charge of foodstuffs for one person energize been constantly reduced. By some friendship, during prehistoric generation when community lived overdue to collecting, to support one person it was necessary to develop from 25 up to 250 square kilometers. During an epoch of agriculture, a slaveholding epoch, this size has decreased and made already about 1 square kilometer. At feudal system it was reduced up to 0, 2 square kilometers, and presently makes from 0, 5 up to 2, 47 acres. The increasing population of a planet demands all greater escalating of order of economic development to keep balance. However if to realize the present condition of technologies such result will cause the increasing environmental pollution and sluice can lead to irrevocable destruction of nature.There is a question is there a authorize d density of population of the Earth, which overcoming may become dangerous to its all inhabitants In this connection the law of doubting Thomas Robert Malthus is interesting. In 1798 Maltus in his book Essay on the Principle of Population has proved, that such threshold exists and mankind is doomed to legislate it. He states that the growth of population occurs in geometrical progression, and the development of scientific and technical progress in arithmetic one. That is the progress can not provide all pack due to too libertine growth of the population. His population theory may be summarized as follows as with other animals, human beings have a natural instinct to bear children to a physical maximum under this fixity of passion people unravel to multiply at an exponential rate where the production of food is constrained by the fixed endowment fund of natural resources, especially land, and can increase only arithmetically, whatever slack of food supply per capita beyond a su bsistence level may exist will stilltually be used up by increased population further increases in population are bound to be checked by famines, pests, and wars of desperate competition for limited food supply thus, it is not possible that the levels of living and income per capita for the majority of people can remain beyond a subsistence minimum in the long run (Godo & Hayami, 2005 73). The dynamics of population growth of the Earth confirms the given hypothesisfor a moment of the beginnings of new calendar - about 230 million people1000 - about 300 million (for one thousand years the population was not even doubled - it has increased less than in 1,5 times)1850 - 1 trillion1930 - 2 billion1976 - 4 billion1987 - 5 billion2000 - 6 billion2025 - 8 billion (is expected). Thus, if earlier for doubling the population it was necessary 1000 years, after 1850 it needed accordingly 80, 46, 50 years. That is now it may be observed the intent of doubling the population within each 50 year s (and most likely the given intent will be kept due to uncontrolled and constantly extending increase of the population from Asia and Africa). By estimation of scientists, the Earth is capable to support 60 billion people. That is a quantity in 10 times exceeding todays population of the Earth (about 6 billion people). At preservation of contemporary (especially African and Asian) rates of increase of population (doubling within 50 years) the critical threshold can be reached already by 2150 - 2200