求中国人口英文作文,要有翻译

发布网友发布时间：2022-04-30 04:41

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热心网友时间：2023-04-24 07:15

OverpopulationOverpopulation is a condition where an organism's numbers exceed the carrying capacity of its habitat. In common parlance, the term usually refers to the relationship between the human population and its environment, the Earth.[1]Overpopulation does not depend only on the size or density of the population, but on the ratio of population to available sustainable resources. It also depends on the means of resources used and distributed throughout the population. If a given environment has a population of 10 indivials, but there is food or drinking water enough for only 9, then in a closed system where no trade is possible, that environment is overpopulated; if the population is 100 but there is enough food, shelter, and water for 200 for the indefinite future, then it is not overpopulated. Overpopulation can result from an increase in births, a decline in mortality rates e to medical advances, from an increase in immigration, or from an unsustainable biome and depletion of resources. It is possible for very sparsely-populated areas to be overpopulated, as the area in question may have a meager or non-existent capability to sustain human life (e.g. the middle of the Sahara Desert or Antarctica).The resources to be considered when evaluating whether an ecological niche is overpopulated include clean water, clean air, food, shelter, warmth, and other resources necessary to sustain life. If the quality of human life is addressed, there may be additional resources considered, such as medical care, ecation, proper sewage treatment and waste disposal. Overpopulation places competitive stress on the basic life sustaining resources, leading to a diminished quality of life.[2] Some countries have managed to increase their carrying capacity by using technologies such as modern agriculture, desalination, and nuclear power.