Renewable resources

Xem 1-20 trên 78 kết quả Renewable resources
  • "Energy for a Warming World" challenges the commonplace notion that the amount of power which mankind can potentially harness from renewable resources is more than large enough to assuage future demand levels. By examining the renewable issue from an electrical engineering perspective, and exercising due regard for the limited capability of current and future electrical generation and transmission systems, this book attempts to provide more realistic statistics for the levels of power which could be extracted from sustainable resources in the critical time frame of 30 to 40 years....

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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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  • A key barrier to the use of plant-derived materials is the high cost of developing the market, even when unique new products have been created. As in many emerging product markets, research in new products begins in small companies that are under-capitalized and lack the resources needed to go beyond the laboratory scale. The success rate for commercialization is low and promising products often languish through lack of volume generation.

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  • With shortages of fossil energy and heavy biomass energy use occurring in both developed and developing countries, a major focus has developed worldwide on renewable energy systems. Currently, a heavy focus is on biofuels made from crops, crop residues and wood. Though it may seem beneficial to use renewable plant materials for biofuel, their use raises many concerns about major environmental problems, including food shortages and serious destruction of vital soil resources.

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  • VN is relative endowed with multiform renewable energy (RE) resources which are distributed through- out the country. They can be exploited for production of energy to meet rapidly increasing energy demand as well as environmental protection....

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  • Renewable Energy is energy generated from natural resources - such as sunlight, wind, rain, tides and geothermal heat - which are naturally replenished. In 2008, about 18% of global final energy consumption came from renewables, with 13% coming from traditional biomass, such as wood burning. Hydroelectricity was the next largest renewable source, providing 3% (15% of global electricity generation), followed by solar hot water/heating, which contributed with 1.3%. Modern technologies, such as geothermal energy, wind power, solar power, and ocean energy together provided some 0.

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  • Increase in electricity demand and environmental issues resulted in fast development of energy production from renewable resources (RES). In the long term, application of RES can guarantee the ecologically sustainable energy supply. This book indicates recent trends and applications of renewable energy resources that organized in 11 chapters.

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  • Energy is important for the existence and development of humankind and is a key issue in international politics, the economy, military preparedness, and diplomacy. To reduce the impact of conventional energy sources on the environment, much attention should be paid to the development of new energy and renewable energy resources. Solar energy, which is environment friendly, is renewable and can serve as a sustainable energy source. Hence, it will certainly become an important part of the future energy structure with the increasingly drying up of the terrestrial fossil fuel.

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  • (BQ) Ebook Earth science: Resources on Earth helps you know what is the difference between renewable and nonrenewable resources? Give examples of each in your explanation, what are some ways in which air, land, and water provide resources? What is an advantage and disadvantage of nuclear power?.

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  • As environmental concerns have focused attention on the generation of electricity from clean and renewable sources wind energy has become the world's fastest growing energy source. The Wind Energy Handbook draws on the authors' collective industrial and academic experience to highlight the interdisciplinary nature of wind energy research and provide a comprehensive treatment of wind energy for electricity generation.

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  • A look on energy, renewable energies, energy storage and synthetic fuels, hybrid architecture, fuel cells, hydrogen as a vector of energy of the future.The Earth resources are quite limited in quantity Many challenges to mankind in 21st century: development, health, water, food, demography, education, energy.In physics, energy (Ancient Greek: ἐνέργεια energeia "activity, operation"[1]) is a quantity that is often understood as the ability a physical system has to produce changes on another physical system.

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  • Scientists who dedicate their research activity to biomaterials pass through the typical dichotomy that often characterizes the basic researc. On one side is the wish of exploring new frontiers of chemistry, physics, biology, medicine, pharmaceutics and all other disciplines to which biomaterials can be applied. The constantly improving scientific knowledge would feed the freedom of attempting new strategies for producing materials with always tailored and improved characteristics.

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  • Tham khảo sách 'biomaterials – physics and chemistry_2', kỹ thuật - công nghệ, hoá học - dầu khí phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả

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  • This report has been prepared by Environmental Resources Management the trading name of Environmental Resources Management Limited, with all reasonable skill, care and diligence within the terms of the Contract with the client, incorporating our General Terms and Conditions of Business and taking account of the resources devoted to it by agreement with the client. We disclaim any responsibility to the client and others in respect of any matters outside the scope of the above.

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  • Several industries will need to contribute to successfully achieve this renewable resources vision. The Executive Steering Group therefore turned to a broad range of disciplines, including crop production, forestry, genomics, chemical processing, fermentation, industrial enzymes, materials science, biotechnology, plant physiology, and product manufacturing. The steering group sought input on key barriers, research goals, and interactions among related areas from more than 120 scientific experts and marketing professionals.

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  • Sustainability of ecosystem needs water which is a finite and vulnerable resource. Fortunately, water is a renewable resource. But management of water resources is always a challenge for sustainability development. Rapid urbanization and industrialization has put more stress on water resources from increased water needs for agriculture, municipal water supply, navigation, recreation, industrial processes and ecosystem maintenance. Agriculture consumes about 70 % of world’s freshwater.

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  • Application of polymers from renewable resources - also identified as biopolymers - has a large potential market due to the current emphasis on sustainable technology. For optimal R&D achievements and hence benefits from these market opportunities, it is essential to combine the expertise available in the vast range of different disciplines in biopolymer science and technology.

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  • Recently public attention has turned toward the intricate interrelation between economic growth and global warming. This book focuses on this nexus but broadens the framework to study this issue. Growth is seen as global growth, which affects the global environment and climate change. Global growth, in particular high economic growth rates, implies a fast depletion of renewable and nonrenewable resources. Thus the book deals with the impact of economic growth on the envi- ronment and the effect of the exhaustive use of natural resources as well as the reverse linkage.

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  • The fact that the Rio Grande lacks sufficient water to permit its use by the inhabitants of both countries does not entitle Mexico to impose restrictions on the United States which would hamper the development of the latter f s territory or deprive its inhabitants of an advantage with which nature had endowed it and which is situated entirely within its territory. To admit such a principle would be completely contrary to the principle that the United States exercises full sovereignty over its national territory....

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  • Allocation is a cross-cutting challenge that has risen to priority status with the rapidly approaching deadlines for the implementation of annual catch limits (ACLs) and accountability measures (AMs). Allocation discussions and decisions are unique to each fishery and are shaped by innumerable natural, social and economic factors. Despite these differences, all allocation decisions address the fundamental question of how to distribute a limited renewable resource among user groups. Allocation decisions introduce new challenges as well as opportunities.

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