A Journal of Solidarity and Sustainability Vol. There are two articles in this page.
Population stabilization and resource conservation will lead to the challenges of sustainability. As the century begins, natural resources are under increasing pressure, threatening public health and development. Water shortages, soil exhaustion, loss of forests, air and water pollution, and degradation of coastlines afflict many areas.
Most developed economies currently consume resources much faster than they can regenerate. Most developing countries with rapid population growth face the urgent need to improve living standards.
As we humans exploit nature to meet present needs, are we destroying resources needed for the future? Environment getting worse About 3 million die from pollution Human population dynamics year.
In the past decade in every environmental sector, conditions have either failed to improve, or they are worsening: Unclean water, along with poor sanitation, kills over 12 million people each year, most in developing countries.
Air pollution kills nearly 3 million more. Heavy metals and other contaminants also cause widespread health problems. Will there be enough food to go around? In 64 of developing countries studied by the UN Food and Agriculture Organization, the population has been growing faster than food supplies.
Population pressures have degraded some 2 billion hectares of arable land — an area the size of Canada and the U. The supply of freshwater is finite, but demand is soaring as population grows and use per capita rises.
Bywhen world population is projected to be 8 billion, 48 countries containing 3 billion people will face shortages. Half of all coastal ecosystems are pressured by high population densities and urban development. Ocean fisheries are being overexploited, and fish catches are down.
Yet human activities are pushing many thousands of plant and animal species into extinction. Two of every three species is estimated to be in decline.
If the global temperature rises as projected, sea levels would rise by several meters, causing widespread flooding.
Global warming also could cause droughts and disrupt agriculture. Toward a livable future How people preserve or abuse the environment could largely determine whether living standards improve or deteriorate.
Growing human numbers, urban expansion, and resource exploitation do not bode well for the future. Without practicing sustainable development, humanity faces a deteriorating environment and may even invite ecological disaster.
Many steps toward sustainability can be taken today. While population growth has slowed, the absolute number of people continues to increase — by about 1 billion every 13 years.
Slowing population growth would help improve living standards and would buy time to protect natural resources.
In the long run, to sustain higher living standards, world population size must stabilize.
Less growth will provide time to solve sustainability problems. Population and sustainable development Environmentalists and economists increasingly agree that efforts to protect the environment and to achieve better living standards can be closely linked and are mutually reinforcing.
Slowing the increase in population, especially in the face of rising per capita demand for natural resources, can take pressure off the environment and buy time to improve living standards on a sustainable basis. This dynamic process has been identified as one of the key reasons that the economies of many Asian countries grew rapidly between and In recent years fertility has been falling in many developing countries and, as a result, annual world population growth has fallen to about 1.
The UN estimated recently that population is growing by about 78 million per year, down from about 90 million estimated early in the s. World population surpassed 6 billion in and is projected to rise to over 8 billion by In many countries, births far outnumber deaths, creating overpopulation.
Globally, fertility has fallen by half since the s, to about three children per woman. In these countries the population continues to increase rapidly.
Another million people live in 44 countries where the average woman has five children or more. Almost all population growth is in the developing world. The shares of other regions are projected to remain about the same as today.kenyatta university university examinations / second semester examination for the degree of bachelor of environmental science ens human population dynamics.
Elephants & Human Population Dynamics of Africa October 23, Ron Thomson Views 2 Comments Botswana, CITES, European Parliament, United States, US Fish and Wildlife Service.
Now I have to take a new tack. I want to talk about the human population dynamics of Africa. The population of the United States with four logistic growth pulses, The population of the United States is analyzed with the sum of four logistics centered on periods of rapid economic growth.
The actual population is the sum of the logistics. Population dynamics and the impact of population on its environment. Primary Learning Objective(s): Students will research the population of humans on Earth and determine surface area, population density, and exponential growth over various time periods.
Human Population Dynamics introduces such frameworks and methodologies whilst demonstrating how changes in human population structure can be addressed from several different academic perspectives. As such, the book contains contributions from world-renowned researchers in demography, social and biological anthropology, genetics, biology.
dynamics relating to the human population—changes in its size, age structure, and geographic distribution—can be seen as indicators relating to environmental sustain-ability. In most discussions of population and sustain-ability, however, population growth is the dominant.