Xem 1-20 trên 247 kết quả Sources of water.
  • Tuyển tập các báo cáo nghiên cứu về bệnh thú y được đăng trên tạp chí y học General Psychiatry cung cấp cho các bạn kiến thức về ngành thú y đề tài: Is Snow a sufficient Source of Water for Horses kept Outdoors in Winter? A Case Report...

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  • This 1993 document entitled "Assessment of Sources of Air, Water, and Land Pollution: A Guide to Rapid Source Inventory Techniques" provides techniques for conducting source inventories in Chapter 2 and describes models for estimating air emissions under current controls in Chapter 3. Appendix II includes the United Nations (UN) classification of industries and services.

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  • Assessment of source of air, water, and land pollution - Part II : Approaches for consideration in formulating evironmantal control strategies.The environment is a combination of natural factors and social surrounds the outside of a certain system. They affect this system and identify trends and status of its existence. Environment can be seen as a set, in which the system is considered as a subset. Environment of a system is considered to be interactive with that system

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  • Water is finite on earth. There is a fixed amount of water which neither decreases or increases. Fresh water is a renewable resource because of the water cycle. From a human perspective the source of freshwater is rainfall. Most of this rainfall is used directly for vegetative growth, such as natural vegetation, pasture, rain-fed maize etc. This process, known as transpiration, is highly productive and produces in Southern Africa the bulk of food crops.

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  • There is an estimated 1.4 billion km3 of water in the world but only approximately three percent (39 million km³) of it is available as fresh water. Moreover, most of this fresh water is found as ice in the arctic regions, deep groundwater or atmospheric water. Since water is the source of life and essential for all life on the planet, the use of this resource is a highly important issue. 'Water management' is the general term used to describe all the activities that manage the optimum use of the world’s water resources....

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  • Economists have long advocated pollution taxes as a policy to improve water quality. One of the reasons water effluent taxes are embraced by economists interested in market-based policies is that sources of water pollution are varied and difficult to assess individually in terms of control costs. In principle, taxes overcome this problem. With a price—the tax—applied to pollution emissions, firms compare the price to their costs of emissions control. If the price is higher than control costs, they reduce emissions rather than pay the tax.

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  • PHI provides a source of insurance in systems with targeted, non-universal access to health care coverage. It plays a particularly large role in countries with a history of private health coverage and an absence of universal coverage. For example, in the Netherlands, nearly all of the population without access to social insurance purchases PHI (about a third of the population), and the majority of the socially insured rely on PHI for coverage of services not included within social insurance.

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  • Water is an invaluable resource for life on earth. Human intervention in nature has affected this resource drastically. Human activities are largely responsible for polluting rivers. Rivers are a very important source of water but they are treated as dumping grounds. This has led to a tremendous decline in the quality of human health and a widespread effect on the environmental conditions. Good maintenance of clean and unpolluted rivers as a source of water is essential for the health and survival of mankind.

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  • According to the traditional water pollution control approach, user-requirement issues would often be overlooked because the identification of such problems is not based on objectively verifiable indicators. Whereas an impact issue can be identified by the presence of, for example, a pollution source or a human activity causing deterioration of the aquatic resources (e.g. deforestation), user-requirement issues are identified by a lack of water of adequate quality for a specific, intended use. ...

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  • Society uses water to generate and sustain economic growth and prosperity, through activities such as farm- ing, commercial fi shing, energy production, manufactur- ing, transport and tourism. Water is important in deciding where we settle and how we use land. Water can also be a source of geo-political confl icts – in particular where water shortages occur. For our own well-being, not only clean drinking water but also clean water for hygiene and sanitation is crucial.

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  • Assessment of source of air, water, and land pollution - Part I : Rapid inventory techniques in environmental pollution

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  • Every year in the U.S. factories release over 3 million tons of toxic chemicals into the land, air and water. This hazardous waste causes us to lose over 15 million acres of land every year, it leads to respiratory complications and other health problems and it makes our rivers and lakes too polluted for us to swim in and drink.

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  • This novel, timely and cost-competitive book on ‘Wetland Systems to Control Urban Runoff’ covers water and environmental engineering aspects relevant for the drainage and treatment of stormwater, wastewater and contaminated natural watercourses from predominantly urban areas, providing a descriptive overview of the complex ‘black box’ treatment systems and design issues involved. The fundamental science and engineering principles of relevant water and wastewater treatment units and processes are explained to address the student as well as the professional market.

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  • Contaminated bottom sediments and their negative impacts on water quality are a major problem in surface waters throughout the United States as well as in many other parts of the world. Even after elimination of the primary contaminant sources, these bottom sediments will be a main source of contaminants for many years to come. In order to determine environmentally-effective and cost-effective remedial actions, the transport and fate of these sediments and associated contaminants must be understood and quantified.

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  • European Union (EU) environmental legislation has developed over the last 30 years and comprises today some 300 legal acts and a large number of other policy documents of relevance for EU environmental policy. Section 1.2.1 of this chapter gives a general introduction to the EU forms of legislation and the principles of the EU environmental policy. The legislation related to the environmental aspects of textile processes in general, primarily the emissions to water and air, is discussed in sections 1.2 to 1.6....

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  • Water-quality engineering is a specialty area in environmental engineering that includes the subspecialties of water treatment, wastewater treatment, and water-quality control in natural systems. This textbook is intended to encompass the latter subspecialty, and the content of this book constitutes baseline knowledge expected of water-quality engineers and managers.

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  • The water problems in Asia’s cities are similar. These include sources and uses of raw water, the large propor-tion of water loss in distribution networks, intermittent supply, and the quality of tap water. In some cities, the excessive use of groundwater resources has caused serious environmental problems, including rapid deple-tion of groundwater, deterioration of water quality, and land subsidence.

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  • The World is confronted with a plethora of potentially disruptive technologies – some, such as nanotechnology, will inevitably challenge our cherished social, economic and industrial stability over the next two decades. Rational design and manufacture of materials properties through nanostructure control will profoundly affect the food we eat, the sources of water and power we use, our health services, our national security, housing, transportation, etc. Precisely what will be the ultimate effect of these disruptions is still unclear.

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  • LIFE IN EARTH’S ATMOSPHERE presents a formidable challenge to land plants. On the one hand, the atmosphere is the source of carbon dioxide, which is needed for photosynthesis. Plants therefore need ready access to the atmosphere. On the other hand, the atmosphere is relatively dry and can dehydrate the plant. To meet the contradictory demands of maximizing carbon dioxide uptake while limiting water loss, plants have evolved adaptations to control water loss from leaves, and to replace the water lost to the atmosphere.

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  • The source of free water loss is either renal or extrarenal. Nonrenal loss of water may be due to evaporation from the skin and respiratory tract (insensible losses) or loss from the gastrointestinal tract. Insensible losses are increased with fever, exercise, heat exposure, and severe burns and in mechanically ventilated patients. Furthermore, the Na+ concentration of sweat decreases with profuse perspiration, thereby increasing solute-free water loss. Diarrhea is the most common gastrointestinal cause of hypernatremia.

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