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population problem essay

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Human overpopulation (or population overshoot) occurs when the ecological footprint of a human population in a specific geographical location exceeds the carrying capacity of the place occupied by that group. Overpopulation can further be viewed, in a long term perspective, as existing if a population cannot be maintained given the rapid depletion of non-renewable resources or given the degradation of the capacity of the environment to give support to the population. Changes in lifestyle could reverse overpopulated status without a large population reduction.[1][2][3]

The term human overpopulation refers to the relationship between the entire human population and its environment: the Earth,[4] or to smaller geographical areas such as countries. Overpopulation can result from an increase in births, a decline in mortality rates, an increase in immigration, or an unsustainable biome and depletion of resources. It is possible for very sparsely populated areas to be overpopulated if the area has a meagre or non-existent capability to sustain life (e.g. a desert). Advocates of population moderation cite issues like quality of life, carrying capacity, and risk of starvationas a basis to argue for population decline. Scientists suggest that the human impact on the environment as a result of overpopulation, profligate consumption and proliferation of technology has pushed the planet into a new geological epoch known as the Anthropocene.[5][6][7]

OverviewEdit

Human population has been rising continuously since the end of the Black Death, around the year 1350,[8] although the most significant increase has been since the 1950s, mainly due to medical advancements and increases in agricultural productivity. The rate of population growth has been declining since the 1980s, while the absolute total numbers are increasing. Recent rate increases in several countries previously enjoying steady declines are also apparently contributing to continued growth in total numbers. As pointed out by Hans Rosling, the critical factor is that the population is not "just growing", but that the growth ratio reached its peek and the total population is now growing much slower.[9]The UN population forecast of 2017 was predicting "near end of high fertility" globally and anticipating that by 2030 over ⅔ of world population will be living in countries with fertility below the replacement level.[10] and for total world population to stabilize between 10-12 billion people by year 2100.

The United Nations has expressed concerns on continued population growth in sub-Saharan Africa.[12] Recent research has demonstrated that those concerns are well grounded.[13][unreliable source?] As of December 21, 2018 the world's human population is estimated to be 7.673 billion.[14] Or, 7,622,106,064 on May 14, 2018 and the United States Census Bureau calculates 7,472,985,269 for that same date.[15] and over 7 billion by the United Nations.[16][17][18] Most contemporary estimates for the carrying capacity of the Earth under existing conditions are between 4 billion and 16 billion. Depending on which estimate is used, human overpopulation may or may not have already occurred. Nevertheless, the rapid recent increase in human population is causing some concern. The population is expected to reach between 8 and 10.5 billion between the years 2040[19][20] and 2050.[21] In 2017, the United Nations increased the medium variant projections to 9.8 billion for 2050 and 11.2 billion for 2100.[22]

The recent rapid increase in human population over the past three centuries has raised concerns that the planet may not be able to sustain present or future numbers of inhabitants. The InterAcademy Panel Statement on Population Growth, circa 1994, stated that many environmental problems, such as rising levels of atmospheric carbon dioxide, global warming, and pollution, are aggravated by the population expansion.[23]Other problems associated with overpopulation include the increased demand for resources such as fresh water and food, starvation and malnutrition, consumption of natural resources (such as fossil fuels) faster than the rate of regeneration, and a deterioration in living conditions. Wealthy but highly populated territories like Britain rely on food imports from overseas.[24] This was severely felt during the World Wars when, despite food efficiency initiatives like "dig for victory" and food rationing, Britain needed to fight to secure import routes. However, many believe that waste and over-consumption, especially by wealthy nations, is putting more strain on the environment than overpopulation.[25]

Most countries have no direct policy of limiting their birth rates, but the rates have still fallen due to education about family planning and increasing access to birth control and contraception.

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