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  1. 1

    Further studies of geographic variation in naturally acquired tuberculin sensitivity.

    World Health Organization [WHO]. Tuberculosis Research Office

    Bulletin of the World Health Organization. 1955; 22:63-83.

    This paper presents the results of the tuberculin-testing of over 3,600 patients in tuberculosis hospitals and of nearly 34,000 schoolchildren in widely separated areas where arrangements could be made for specially trained personnel to work uniform materials and techniques. Both patients and children were tested with an intradermal dose of 5 TU, and the children were retested with 100 TU if the reactions were less than 5 mm. The results confirm those of earlier papers, that at least two different kinds of naturally acquired tuberculin sensitivity are found in many human populations: a high-grade sensitivity, designated as specific for virulent tuberculous infection, and a low-grade kind designated as non-specific, or not specific for tuberculous infection. Specific sensitivity is the kind found in tuberculous patients and in some schoolchildren everywhere. It follows a remarkably uniform pattern wherever it is found, apparently varying only in prevalence, not in degree, from place to place. In contrast, non- specific sensitivity varies both in prevalence and in degree. It ranges from nearly universal prevalence in some localities to almost complete absence in others, from a low degree to a relatively high degree approaching that of specific sensitivity. Non-specific sensitivity is not correlated with specific sensitivity and may have different causes in different places. (excerpt)
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  2. 2

    Climate change: the IPCC response strategies.

    Intergovernmental Panel on Climate Change [IPCC]

    Washington, D.C., Island Press, 1991. lxii, 272 p.

    In 1988, the World Meteorological Organization and the UN Environment Program established the Intergovernmental Panel on climate Change (IPCC) to consider scientific data on various factors of the climate change issue, e.g., emissions of major greenhouse gases, and to draw up realistic response strategies to manage this issue. Its members have agreed that emissions from human activities are indeed increasing sizably the levels of carbon dioxide, methane, chlorofluorocarbon (CFC), and nitrous oxide in the atmosphere. The major conclusions are that effective responses need a global effort and both developed and developing countries must take responsibility to implement these responses. Industrialized countries must modify their economies to limit emissions because most emissions into the atmosphere come from these countries. They should cooperate with and also provide financial and technical assistance to developing countries to raise their living standards while preventing and managing environmental problems. Concurrently, developing countries must adopt measures to also limit emissions as their economies expand. Environmental protection must be the base for continuing economic development. There must be an education campaign to inform the public about the issue and the needed changes. Strategies and measures to confront rapid population growth must be included in a flexible and progressive approach to sustainable development. Specific short-term actions include improved energy efficiency, cleaner energy sources and technologies, phasing out CFCs, improved forest management and expansion of forests, improved livestock waste management, modified use and formulation of fertilizers, and changes in agricultural land use. Longer term efforts are accelerated and coordinated research programs, development of new technologies, behavioral and structural changes (e.g., transportation), and expansion of global ocean observing and monitoring systems.
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  3. 3

    The global possible: resources, development, and the new century.

    Global Possible Conference (1984: Wye Plantation)

    In: The global possible: resources, development, and the new century, edited by Robert Repetto. New Haven, Connecticut, Yale University Press, 1985. 491-519. (World Resources Institute Book)

    Participants at the Global Possible Conference in 1984 concluded that, despite the dismal predictions about the earth, we can still fashion a more secure, prosperous, and sustainable world environmentally and economically. The tools to bring about such a world already exist. The international community and nations must implement new policies, however. Government, science, business, and concerned groups must reach new levels of cooperation. Developed and developing countries must form new partnerships to implement sustained improvements in living standards of the world's poor. Peaceful cooperation is needed to eliminate the threat of nuclear war--the greatest threat to life and the environment. Conference working groups prepared an agenda for action which, even though it is organized along sectoral disciplines, illustrates the complex linkages that unite issues in 1 area with those in several others. For example, problems existing in forests tie in with biological diversity, energy and fuelwood, and management of agricultural lands and watersheds. The agenda emphasizes policies and initiatives that synergistically influence serious problems in several sectors. It also tries to not present solutions that generate as many problems as it tries to solve. The 1st section of the agenda covers population, poverty, and development issues. it provides recommendations for developing and developed countries. It discusses urbanization and issues facing cities. The 3rd section embodies freshwater issues and has 1 list of recommendations for all sectors. The agenda addresses biological diversity, tropical forests, agricultural land, living marine resources, energy, and nonfuel minerals in their own separate sections. It discusses international assistance and the environment in 1 section. Another section highlights the need to assess conditions, trends, and capabilities. The last section comprises business, science, an citizens.
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  4. 4

    World resources 1992-93.

    World Resources Institute; United Nations Environment Programme [UNEP]; United Nations Development Programme [UNDP]

    New York, New York, Oxford University Press, 1992. xiv, 385 p.

    The World Resources Institute, the UN Environment Programme, and the UN Development Programme collaborate to produce the World Resources series to provide organizations and individuals with accessible and accurate information on the trends and conditions of natural resources and protection of the environment. This information is needed to reach sustainable development, eliminate poverty, improve the standard of living, and preserve biological life-sustaining systems. This 5th volume stresses sustainable development as does the 1992 UN Conference on Environment and Development. Part I, entitled Sustainable Development, includes an overview chapter and 3 case studies of possible means to achieve sustainable development in industrialized countries, low income countries, and rapidly industrializing countries. Part II focuses on one region of the world, Central Europe, to discuss how it was able to degrade the environment, the magnitude of the damage, and what possible steps to take to ameliorate the situation. Part III addresses basic conditions and trends, key issues, major problems and efforts to resolve them, and recent developments in population and human development, food and agriculture, forests and rangelands, wildlife and habitat, energy, freshwater, oceans and coasts, atmosphere and climate, and policies and institutions (governmental and nongovernmental organizations). Part IV lists core and supporting data from the World Resources Data Base. This volume contains an index and a World Resources Data Base index.
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  5. 5

    Environmental deterioration and population.

    World Health Organization [WHO]

    In: The population debate: dimensions and perspectives. Papers of the World Population Conference, Bucharest, 1974. Volume II, compiled by United Nations. Department of Economic and Social Affairs. New York, New York, United Nations, 1975. 105-9. (Population Studies No. 57; ST/ESA/SER.A/57)

    In 1974 World Population Conference in Bucharest, romania, WHO discusses degradation of the environment and population. In developing countries, poor sanitary conditions and communicable diseases are responsible for most illnesses and deaths. Physical, chemical, and psychosocial factors, as well as pathogenic organisms, cause disease and death in developing countries. Variations in individuals and between individuals present problems in determining universally valid norms relating to environment and health. Researchers must use epidemiological and toxicological methods to identify sensitive indicators of environmental deterioration among vulnerable groups, e.g., children and the aged. Changes in demographics and psychosocial, climatic, geographical, geological, and hydrologic factors may influence the health and welfare of entire populations. Air pollution appears to adversely affect the respiratory tract. In fact, 3 striking events (Meuse valley in France [1930], Donora valley in Pennsylvania [US], and London [1952] show that air pollution can directly cause morbidity, especially bronchitis and heart disease, and mortality. Exposure to lead causes irreparable brain damage. Water pollution has risen with industrialization. Use of agricultural chemicals also contribute to water pollution. Repeated exposure to high noise levels can result in deafness. Occupational diseases occur among people exposed to physical, chemical, or biological pollutants at work which tend to be at higher levels than in the environment. Migrant workers from developing countries in Europe live in unsafe and unhygienic conditions. Further, they do not have access to adequate health services. Nevertheless, life expectancy has increased greatly along with urbanization and industrialization. A longer life span and environmental changes are linked with increased chronic diseases and diseases of the aged.
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  6. 6

    Economic aid and the environment.

    Repetto R

    EPA JOURNAL. 1990 Jul-Aug; 16(4):20-2.

    Approximately 1/3 of the signatories of the Montreal Protocol on ozone depletion were developing countries lacking the resources to pay for its implementation. Germany announced at 25% reduction of carbon dioxide emissions by 2005, the Netherlands, the UK, and Japan promised similar steps. The southern hemisphere has to reduce emissions with improved technology from the northern hemisphere, as 45% of greenhouse gases are generated there. There is need to finance such initiatives: $20-50 billion a year is required by 2000 to help these countries. The world Resources Institute proposed a green investment fund for the environment or Ecovest. It was first proposed in eastern Europe by the Nordic Environmental Finance Corporation (NEFCO) in 1990 with an initial capital of $47 million. The US Overseas Private Investment Corporation set up a $100 million for-profit Environmental Investment Fund for eastern Europe and the developing world for sustainable agriculture, forest management, eco-tourism, renewable energy, and pollution prevention. Debt-for-nature swaps between nongovernmental agencies and governments to purchase debt at discount have been paid in bonds for nature conservation in Bolivia, Ecuador, Costa Rica, the Philippines, Zambia, and Madagascar. $69 million of Costa Rica's debt was converted in 2 years to save parks, protected areas, and finance reforestation. The debts of some African countries have been written off by donor countries. The Bush Administration proposed to write off parts of Latin America's $7 billion debt. The Global Environment Fund of the World Bank proposed to lend $300-400 million a year for environmental projects in developing countries and in eastern Europe. The main goals are to protect the ozone layer, prevent deforestation and desertification, and clean up pollution. Some companies finance reforestation in Guatemala to offset their own emissions.
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  7. 7

    Fresh water.

    Rogers PP

    In: The global possible: resources, development, and the new century, edited by Robert Repetto. New Haven, Connecticut, Yale University Press, 1985. 255-98. (World Resources Institute Book)

    Everyone uses fresh water. Water is the most used substance by industry. Even though industry only makes up 5-10% of current worldwide water use, it contributes a disproportionate amount of toxic contaminants to the water supply. The most important socioeconomic factors of municipal water demand are household income and size. Agricultural demand is the single largest demand for water. In the US, it makes up 83% of annual total water consumption. Water demand has resulted in some of the world's biggest construction and weather modification projects which greatly alter basic ecosystems. Multinational institutions such as the World Bank and the International Development Association support most of these projects in developing countries. We have abused water perhaps more than any other resource. These abuses have caused considerable adverse effects. For example, after farmers in Africa and Asia began irrigating fields, many people fell ill with schistomosiasis. Other waterborne diseases include typhoid fever and diarrheal diseases. Investments in water supplies as well as in wastewater treatment are needed to improve public health. The largest consumers of fresh water in the world are those countries with the largest populations (49% of the world's population) and largest total land area (32% of the this area): China, India, the US, and the USSR. These 4 countries have 61-70% of the world's total irrigated land, but China and India have most of it (54%). Most US water expenditures are for water pollution control. The US has a very efficient agricultural system but the efficiency is technical rather than economic. Most water expenditures in the USSR and India are for irrigation. China spends most of its water resource funds on irrigation and drainage systems. All countries in the world should conduct a rational analysis of fresh water uses, implement rational water pricing policies to conserve water use, and stabilize water supplies such as capturing surface runoff.
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  8. 8

    The earth's vital signs.

    Brown LR; Flavin C

    In: State of the world 1988. A Worldwatch Institute report on progress toward a sustainable society. New York, New York, W.W. Norton, 1988. 3-21.

    Most of the recognized threats to the world environment, such as the destruction of forests by acid rain, the ozone hole, population growth, energy use, and the greenhouse effect, have moved from hypothetical projections to present-day realities which can be solved only by international efforts. The Montreal accords of 1987 to limit the production of chlorofluorocarbons and the UN call for a cease-fire in the Iran-Iraq war were steps in this direction. But a look at the "vital signs" of the earth as expressed by environmental crises will show how much more is needed. Deforestation for agriculture and logging causes as estimated loss of 11 million hectares of forest each year. Deforestation means erosion. The topsoil layer, once 6-10 inches deep over the globe is being blown or washed away at the rate of 26 billion tons a year. The soil is not only being depleted, it is being contaminated by agricultural pesticides and toxic wastes. In Poland, for example, 1/4 of the soil is unfit for food production, and only 1% of the water is safe for drinking due to chemical contamination. The depletion of the ozone layer is no longer observed only in Antarctica; it has dropped up to 9% in North Dakota, Maine, and Switzerland. The loss of forests and the acidification of lakes and soil are causing whole species to become extinct. World population continues to grow, as each year 80 million more people are born than die. But the real problem is not population growth per se; it is the relationship between population size and the sustainable yield of local forests, grasslands, and croplands. In 1982 India's forests could sustain an annual harvest of 30 million tons of wood; the estimated demand was 133 million tons. In 9 Southern African countries the number of cattle exceed the carrying capacity of the grasslands by 50% to 100%. In India enough fodder is raised to supply only 50% to 80% of the needs of cattle. The results of deforestation, overgrazing and overplowing is desertification, which compounded by drought, brings famine. The relationship between population growth and land degradation is reflected in per capita food production. In China it has risen by 1/3 since 1970, but in Africa it has fallen by 1/5; and India, despite the Green Revolution, will have to import grain if there is another failure of the monsoons. Another indicator of environmental ill-health is energy consumption, which is again on the rise. Industrial use of oil and coal, especially in the US, the USSR, and China, has resulted in air pollution and acid rain, which by September 1987 had damaged 30.7 million hectares of forests in Europe. But by far the most serious result of the burning of fossil fuels and wood is the 7 billion tons of carbon discharged annually into the atmosphere, causing the greenhouse effect, which will raise the global temperature between 1.5 and 4.5 degrees Celsius by year 2050. Patterns of World settlement and agriculture will change drastically; irrigation and drainage systems will have to be adjusted; and a rise in sea levels between 1.4 and 2.2 meters by year 2100 could inundate coastal cities. In view of these deteriorating "vital signs" of the planet, nations must work together to turn one earth into one world. The Montreal accord on ozone protection and the 1987 US-Soviet arms limitation were a good beginning. The greenhouse effect and the changing climate are logical candidates for the next round of world environmental deliberations.
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