Consequences of Rapid Population Growth
The growth in human population around the world affects all people through its impacts on the economy, social and environment sectors. Rapid human population growth has a variety of consequences which in this essay it would be separated becoming micro and macro levels consequences. The micro level consequences in this context are referred to individual and family things while the macro level consequences are referred to regional, national and global things instead.
At the micro level, rapid population growth has delivered to unmet need which significantly threat child and maternal health and family welfare (United Nations Population Information Network / POPIN website).
If the number of family member increases while the family income still in low rate (poor family) and can not cover the family needs, so then children may be affected by micronutrient deficiencies and easily attacked by diseases which also have a detrimental effect on growth and development. Furthermore, most maternal deaths are due to unsafe practices in terminating pregnancies, a lack of readily available services for high-risk pregnancies, and women having too many children or having them too early and too late in life (World Population Balance website). On the other hand, lower fertility levels resulting in smaller families were thought to benefit both parents and their children directly, at least the wife has more chance as an employment to support family welfare (United Nations Population Information Network / POPIN website).
At the macro level, rapid population growth has delivered a number of consequences such as environmental threats, poverty, scarcities of food and fresh water and international security threat.
Environmental Threats
Rapid population growth will emerge the expansion of human activity. The expansion of human activity will cause the destruction of forest and the loss of biological diversity which may lead to instability of ecological systems and reducing ability of the ecosystem to combat global warming. As reality,
the population growth is following by increasing of water pollution, erosion of hillsides and silting of rivers, increasing of greenhouse gases, rising sea levels, growing weather severity, disruption of agriculture, and increase the energy and resources consumption (Population Media Center website).
Poverty
Rapid population growth aggravates poverty in developing countries by producing a high ratio of dependent children for each working adult.
This leads to a relatively high percentage of income being spent on immediate survival needs of food, housing, and clothing, leaving little money for purchase of elective goods or for investment in the economy, education, government services, or infrastructure. Lack of available capital continues to frustrate the attempts of many developing countries to expand their economies and reduce poverty. Only about 20 percent of the current world’s population has a generally adequate standard of living. The other 80 percent live in conditions ranging from mild deprivation to severe deficiency. This imbalance is likely to get worse, as more than 90 percent of future population growth is projected for the less developed countries ( Population Media Center website)(see Figure 1)
Scarcities of Food and Fresh Water
Productive agricultural systems have contributed to economic progress in many countries, both developed and less developed. The Green Revolution of the 1970s enabled some developing countries to become net exporters of food. Yet,
global population growth during and since the Green Revolution is continuing to consume more and more of the expanding food base, leading to a decline in per capita availability of cereal grains on a global basis over the last 15 years.
The world’s agricultural systems rely substantially on increasing use of fertilizers. But now, the world’s farmers are witnessing signs of a declining response curve, where the use of additional fertilizer yields little additional food product. At the same time, fertilizers and intensive cropping lower the quality of soil. These factors will more and more limit the possibilities of raising food production substantially and will, at a minimum, boost relative food prices and resulting hunger for many. So will the mounting resistance of pests to insecticides, which are used increasingly by the world’s farmers. On a global basis, 37 percent of food and fiber crops are now lost to pests. At the same time, nitrogen-based fertilizers are yielding nitrous oxide, which adds to the greenhouse effect of the carbon dioxide humans produce.
At the same time, shortages of water are at a crisis point in many countries. At least 400 million people live in regions with severe water shortages. By the year 2050, it is projected to be approximately two billion. Water tables on every continent are falling, as water is pumped out at far greater rates than rainwater can replenish in order to provide irrigation for agriculture.
"India, for example, is pumping out its underground aquifers at twice the rate of natural replenishment." Humans are already using half of the globe’s products of photosynthesis and over half of all accessible fresh water. Long before human demand doubles again, the limits of the ecosystem’s ability to support people will become dramatically evident (Population Media Center website).
Threats to International SecurityAs mentioned earlier, population growth is a major contributor to economic stagnation through its depressing effect on capital formation. With growing numbers of young people attempting to enter the labor force, many developing countries have extraordinarily high levels of unemployment. Often high rates of unemployment give rise to severe political instability, which ultimately threatens national and international security.
Moreover, the combination of poverty and violence is adding rapidly to the number of refugees seeking to move into more stable and prosperous areas. Growth of refugee and migrant populations are contributing to political instability and economic dislocation in many countries. Intelligence agencies in the U.S. and elsewhere have long recognized the implications of population growth for international security ( Population Media Center website) (see Figure 2)
Consequences of Rapid Population Growth « Indonesians Resonance
High population density is greatest risk factor for water-linked diseases
COLUMBUS, Ohio –
Water-associated infectious disease outbreaks are more likely to occur in areas where a region’s population density is growing, according to a new global analysis of economic and environmental conditions that influence the risk for these outbreaks.
Ohio State University scientists constructed a massive database containing information about 1,428 water-associated disease outbreaks that were reported between 1991 and 2008 around the world. By combining outbreak records with data on a variety of socio-environmental factors known about the affected regions, the researchers developed a model that can be used to predict risks for water-associated disease outbreaks anywhere in the world.
The research appears in PLoS Neglected Tropical Diseases, a journal published by the Public Library of Science.
There are five different categories of water-associated diseases, depending on the role water plays in the disease transmission process. Population density was a risk factor for all types of these diseases. Prolonged and excessive heat was shown to be a driver of water-related diseases that are transmitted to people by insect bites.
The study shows that clusters of reported outbreaks tended to occur in Western Europe, Central Africa, Northern India and Southeast Asia. These regions, as well as Latin America and eastern Brazil, were targeted as potential “hot spots” at highest risk for future water-associated disease outbreaks ranging from E. coli-related diarrhea to dengue fever.
World health experts conservatively estimate that 4 percent of deaths – almost 2 million annually – and 5.7 percent of illnesses around the world are caused by infectious diseases related to unsafe water and sanitation and hygiene problems. Getting a better handle on the socio-environmental factors that affect the risks for water-associated disease outbreaks is a first step toward guiding policymakers as they prioritize the distribution of health resources around the world, the researchers say.
“We know water is essential to life, but we also know that water is a vehicle that can carry hazards. If we understand the risk factors of disease better, we can inform policy decisions because resources are limited. Second, we can provide an early warning to certain places that are undergoing global environmental change because our model shows how those changes affect outbreak risks,” said Song Liang, senior author of the study and an assistant professor of environmental health sciences at Ohio State.
“We’re not going to address all of the questions in one study, but we hope to set the stage for studies that can move toward that goal.”
Most information on water-associated pathogens and infectious diseases in the Ohio State database came from the Global Infectious Disease and Epidemiology Network (GIDEON), a web-based database containing details on outbreaks for 337 recognized infectious diseases in 231 countries and regions. Liang and colleagues also collected extensive data from journal articles and health organization publications to supplement the GIDEON information.
Among the information included in the Ohio State database were disease-causing agents,
such as bacteria or viruses, and their biological characteristics; water’s role in disease transmission; disease transmission routes; and details about whether the recorded outbreak represented an emergence or re-emergence of a water-associated disease for a given region. These details were crossed with a socio-environmental database that contained data on population density, global average accumulated temperature, surface area of water bodies, average annual rainfall and per-capita gross domestic product.
Each disease tracked in the database was classified into one of five categories:
• water-borne (such as typhoid and cholera), caused by microorganisms that enter water through fecal contamination and cause infection when humans consume contaminated water. A subset of these, called “water-carried” diseases, result from accidental ingestion of contaminated water in a recreational setting;
• water-based (such as schistosomiasis), caused by parasites that spend part of their life in water;
• water-related (such as malaria and trypanosomiasis), which need water for breeding of insects that act as vectors in transmitting disease to humans;
• water-washed, caused by poor personal or domestic hygiene because no clean water is available; and
• water-dispersed (such as Legionella), caused by infectious agents that thrive in water and enter the body through the respiratory tract.
Among the reported outbreaks, 70.9 percent were water-borne diseases, 2.9 percent water-based, 12.2 percent water-related, 6.8 percent water-washed, and 7.3 percent water-dispersed. Almost half were caused by bacteria, with nearly 40 percent caused by viruses and the rest by parasites.
The analysis also showed that fewer water-washed diseases occurred in places with larger bodies of surface water, and that areas with higher average annual rainfall had fewer outbreaks of water-borne and water-related diseases.
“No single factor can explain this distribution,” Liang said. “And for different categories of diseases, the impact of those factors varies. This is the first time we’ve had large-scale proof of that."
“At this point, we’ve identified all of the reported outbreaks, but not every socio-environmental factor that influenced them.”
The model predicts that Western Europe, Central Africa and Northern India are at higher risk for water-borne diseases, especially E. coli diarrhea, and that the risk in Europe is primarily driven by water-carried diseases that tend to occur in recreational areas. Western Europe, North Africa and Latin America tend to be at higher risk for water-washed diseases, particularly viral conjunctivitis.
Risks associated with water-based diseases, especially schistosomiasis, were highest in east Brazil, Northwest and Central Africa and southeast of China.
Even with all of the data available, the researchers suggest that their database and map represent just a fraction of the actual outbreaks that have occurred because the under-reporting of these diseases is a common problem, especially in the developing world.
They also were surprised to find that economic status did not appear to influence risk for water-associated disease outbreaks, at least on a global scale. “When we look specifically at an area on a smaller scale, we might find something different,” Liang said.
Liang and colleagues already have begun to take a closer look at two regions, Africa and Asia, to examine environmental and economic issues that are most likely to influence risks for water-associated infectious disease outbreaks on those continents.
This work is supported in part by the National Institutes of Health and by two Ohio State University programs: Public Health Preparedness for Infectious Diseases and Climate, Water and Carbon.
Co-authors, all from Ohio State, include first author Kun Yang and Bo Lu of the College of Public Health (Yang is now with the Jiangsu Institute of Parasitic Diseases in China); Jeffrey LeJeune of the Ohio Agricultural Research and Development Center and the College of Veterinary Medicine; and Doug Alsdorf and C.K. Shum of the School of Earth Sciences.
High population density is greatest risk factor for water-linked diseases | College of Public Health
