Scientists worry that rapid population growth will over nests the earth's natural resources and crowd out undomesticated plant and animal species. All people want to be fed, clothed, housed, and have access to clean water. To meet these requirements, water, land, forests, and other natural resources must be exploited to some degree. As population increases, more resources are needed to meet basic requirements. More forest must be cut down to provide wood for housing and fuel. More cleared land is needed for agriculture and development. All of these resources are finite. More than 99% of the world's food supply comes from the land, while less than 1% is from oceans and other aquatic habitats. The continued production of an adequate food supply is directly dependent on ample fertile land, fresh water, energy, plus the maintenance of biodiversity. As the human population grows, the requirements for these resources also grow. Even if these resources are never depleted, on a per capital basis they will decline significantly because they must be divided among more people.
During the last century, a sharp decline in premature mortality due to previously rampant infectious and chronic diseases has Increased life expectancy. This has naturally led to an increase in the number of old people. At the same time, the invention and availability of modern contraceptive methods has caused a substantial fall in fertility. These two phenomena are together contributed to population ageing Population ageing is the trend where more people live to reach old age while fewer children are born.
Population growth control methods for India
The main reasons for the ageing of society are socio economic but better health care has improved survival for specific diseases. The existence of more old people and more survivors of serious diseases means an increase in the incidence of morbidity and non-life-threatening but disabling chronic diseases and conditions. As a society ages. there may come a time when there are not enough young people to finance or care the old. However, the actual cost of older people depends partly on the society in which they live. For example. an old man who lives with his family In a small village in an undeveloped country is likely to cost less than a retired executive in a developed country. A retired executive is likely to have accumulated sufficient wealth to provide for him to at least some extent in old age.
The increases in average life expectancy has lead to the population of older people to grow at a rate of 2.8% per year world wide. A parallel trend has been a reduction in fecundity and fertility and so the overall population growth (all ages) has been less, only 1.6% per year. The consequence is an ageing society, with a proportionately high (and increasing) number of older people.
Simple ways to control population growth
At the same time as people consume these resources, they produce waste that is put back into the air,land and water. The greater amount of waste from larger populations puts more stress on ecosystems. Even if markets function with perfect efficiency, and the best technology is always used, it will take more resources to support a larger population than a smaller one, and the environmental costs of doing so will probably be higher as well. It is true that the highest population growth rates are found in developing countries. However, because affluent countries consume more resources, they remain the primary contractors to certain global like global warming. The G7 nations, the US, Canada, Britain, France, Germany,environmental problems like global Japan, and italy represent only 10% of global population but consume over 40% of the earth's fossil fuels as well as most of the world's commodities and forest products. Because consumption rates are so high in these counties, even small increases in population can have a significant impact. The US, in particular, continues to have a higher rate of population growth than most of the other industrial countries.increasing the nation's environmental impact.During the last century, a sharp decline in premature mortality due to previously rampant infectious and chronic diseases has Increased life expectancy. This has naturally led to an increase in the number of old people. At the same time, the invention and availability of modern contraceptive methods has caused a substantial fall in fertility. These two phenomena are together contributed to population ageing Population ageing is the trend where more people live to reach old age while fewer children are born.
Population growth control methods for India
The main reasons for the ageing of society are socio economic but better health care has improved survival for specific diseases. The existence of more old people and more survivors of serious diseases means an increase in the incidence of morbidity and non-life-threatening but disabling chronic diseases and conditions. As a society ages. there may come a time when there are not enough young people to finance or care the old. However, the actual cost of older people depends partly on the society in which they live. For example. an old man who lives with his family In a small village in an undeveloped country is likely to cost less than a retired executive in a developed country. A retired executive is likely to have accumulated sufficient wealth to provide for him to at least some extent in old age.
The increases in average life expectancy has lead to the population of older people to grow at a rate of 2.8% per year world wide. A parallel trend has been a reduction in fecundity and fertility and so the overall population growth (all ages) has been less, only 1.6% per year. The consequence is an ageing society, with a proportionately high (and increasing) number of older people.
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