File Name: population growth and explosion .zip
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.
The largest single threat to the ecology and biodiversity of the planet in the decades to come will be global climate disruption due to the buildup of human-generated greenhouse gases in the atmosphere. People around the world are beginning to address the problem by reducing their carbon footprint through less consumption and better technology. But unsustainable human population growth can overwhelm those efforts, leading us to conclude that we not only need smaller footprints, but fewer feet. Portland, Oregon, for example, decreased its combined per-capita residential energy and car driving carbon footprint by 5 percent between and During this same period, however, its population grew by 8 percent. Scientists warn we must reduce atmospheric CO 2 to ppm in order to avoid global catastrophe. Each child born in the United States will add about 9, metric tons of carbon dioxide to the carbon legacy of an average parent.
Population growth is the increase in the number of individuals in a population. Global human population growth amounts to around 83 million annually,  or 1. The global population has grown from 1 billion in to 7. It is expected to keep growing, and estimates have put the total population at 8. World population has been rising continuously since the end of the Black Death , around the year
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.
The most spectacular demographic changes in the whole of human history are currently taking place on the African continent and this development is set to continue over the course of the coming decades. As Europeans used to stagnant population figures, we find it very difficult to grasp the consequences of a three per cent growth in population leading to an approximate doubling of the population every twenty years. In Terms of Demographics, Africa is a Special Case In sub-Saharan Africa, we witness a demographic development different from that of the other continents.
If you create an account, you can set up a personal learning profile on the site. Figure 2. Growth is slow until the middle of the 20th century, when the gradient slope of the graph increases, indicating a change to more rapid population growth.
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.
Dear EarthTalk : To what extent does human population growth impact global warming, and what can be done about it? No doubt human population growth is a major contributor to global warming, given that humans use fossil fuels to power their increasingly mechanized lifestyles. According to the United Nations Population Fund, human population grew from 1. Think about it: It took all of time for population to reach 1. During that time emissions of CO2, the leading greenhouse gas, grew fold. And with worldwide population expected to surpass nine billion over the next 50 years, environmentalists and others are worried about the ability of the planet to withstand the added load of greenhouse gases entering the atmosphere and wreaking havoc on ecosystems down below. The United States, for example, contains just five percent of world population, yet contributes a quarter of total CO2 output.
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.
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.
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. Even with a demand for family planning services, the adequate availability of and access to family planning and other reproductive health services are essential in facilitating slowing of the population growth rate.
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.Deborah C. 05.05.2021 at 14:12
Next, the mechanisms behind unprecedented population growth are explained and plausible scenarios for future developments are discussed.Michael L. 05.05.2021 at 14:44
PDF | The rapid increase of human population is putting an incredible strain on our environment. While developed countries continue to pollute the | Find, read.