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Aswan DamIt is made up of the main damSpillwayand the power station three orange mill part. The total length of the main dam is 3,600 meters, the width of the dam base is 980 meters, the width of the dam crest is 40 meters, the height of the dam is 111 meters, and the building materials used are about 43 million cubic meters, which is equivalent to the volume ofCairoThe western suburbs are 17 times the size of the Great Pyramid of Kufu, which can be called one of the seven largest dams in the world. Construction began in 1960 and was completed in 1971.
Ranked 11th among the world's dams. The dam is a comprehensive utilization project integrating flood control, irrigation, shipping and power generation.
The Aswan Dam built by using modern science and technology has irrigated more than 90 percent of Egypt's arable land, greatly increased the multiple cropping index of Egyptian farmland, and rapidly increased agricultural output, and the Aswan Dam has not only increased the irrigated area of Egypt by 1.3 million 2 million hectares, but also turned 700,000 hectares of one-season crop area into a multi-season crop area for permanent irrigation, increasing the irrigated area of Egypt by 25 percent and 30 percent.
The Aswan dam increased cotton production by 50 percent and increased arable land by 2 million angstroms. More importantly, 4,000 villages across Egypt have been electrified thanks to the huge and cheap electricity generated by the Aswan Dam power station. The dam generates 8 billion kilowatt hours of electricity per year, providing 70% of the country's total electricity consumption, and becoming Egypt's power base.
At the same time, the Aswan Dam stopped the Nile.
The annual flooding of the Nile River defuses the threat of the Nile flood to Egypt.
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Population: family planning, so that human beings are not too much, resources: the use of renewable resources, so that future generations can also enjoy the convenient environment brought by this resource: reduce pollution, give future generations a blue sky to know that you have to accumulate in life and study!
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All waste utilization, energy conservation is a reputation for sustainable development, waste paper, water conservation, low-carbon environmental protection, mainly recycling and reusing the locust for the benefit of future generations are sustainable development.
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<> adjust the structure of the agricultural industry and develop agriculture in accordance with local conditions; control the growth of the rural population and improve the quality of the population; increase investment in agricultural science and technology, and accelerate the application and popularization of agricultural technology; the development of water-saving agriculture and ecological agriculture; the combination of agricultural development and ecological environmental protection; Extend the industrial chain, increase the added value of agricultural products and farmers' income, etc.
1. Measures for sustainable agricultural development
1. Adjust the structure of agricultural industry and develop agriculture according to local conditions; control the growth of the rural population and improve the quality of the population; increase investment in agricultural science and technology, and accelerate the application and popularization of agricultural technology; develop water-saving agriculture and ecological agriculture; the combination of agricultural development and ecological environmental protection; extend the industrial chain, increase the added value of agricultural products, and increase farmers' income; strengthen the construction of agricultural infrastructure and improve the conditions for agricultural production; Improve the agricultural ecological environment and promote the sustainable development of agriculture.
2. Sustainable development agriculture refers to an agricultural system that adopts a certain way of rational use and maintenance of natural resources, implements technological changes and institutional reforms, and ensures the sustainable development of the demand for agricultural products of the present and future generations.
3. Sustainable agriculture is an agriculture that continuously meets the needs of contemporary human beings for the quantity and quality of agricultural products through the management, protection and sustainable use of natural resources, and adjusts agricultural systems and technologies, without harming the interests of future generations.
2. Sustainable agricultural zoning
In view of the problems faced by the sustainable development of agriculture in various regions, the country is divided into optimized development areas, moderate development areas, and protected development areas by comprehensively considering the carrying capacity, environmental capacity, ecological type and development foundation of agricultural resources in various regions, and the direction and focus of sustainable agricultural development in different regions are determined in accordance with the principles of adapting measures to local conditions, echelon advancement, and classified policies.
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1. The historical origin of the concept of "sustainable development" can be traced back to the logging industry in Germany in the first century. At that time, in response to excessive deforestation, the concept of "sustainable development" was proposed in order to ensure the normal and sustainable use of timber**.
2. Sustainable development of agriculture refers to the formation of a new pattern of agricultural development in agriculture that is resource-saving, environment-friendly, industrially efficient, and increases farmers' income.
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"Sustainable agriculture" is an extension of the concept of "sustainable development" to agriculture and agriculture.
Zhi village economy is generated by dao. Joint Special Committee, 1991.
The FAO has developed the concept of sustainable agriculture (SAA), which is the management and conservation of the natural resource base and the reorientation of technological and institutional changes in order to ensure that the needs of present and future generations are met and met in a sustainable manner. It is therefore a tool that protects and maintains land, water, flora and fauna resources without causing environmental degradation; At the same time, agriculture that is technically feasible, economically viable, and socially acceptable.
The idea of sustainable agriculture has run through the whole process of agricultural production and has become an important guiding ideology for agricultural development.
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Sustainable agricultural development refers to the development of agriculture to meet the needs of the present generation, and does not pose a special threat to the ability of future generations to meet their needs, that is, to achieve the purpose of developing agriculture, but also to protect the atmosphere, fresh water, ocean, land and forests and other natural resources and environment on which human beings depend, so that future generations can live and work in peace and contentment.
One is to increase output, but consume a lot of resources, such as oil, coal, etc., the result is that our current needs are met, but our children grow up without oil, coal and other non-renewable resources that can be used;
Second, enterprises increase output at the expense of the environment, and the emission of pollutants is serious, which affects the environment, which affects the living space of future generations and their quality of life.
That is why we advocate economic growth and increased output, but not to the detriment of future generations and not to the detriment of the environment.
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1) International significance: Since China is a large agricultural country, first of all, how to formulate a set of effective and effective policy measures through in-depth research on this issue and put them into practice, so as to protect China's agriculture and the entire national economy.
Sustained, coordinated and rapid development. Secondly, there are many developing countries in the world that are similar to ours.
The tremendous achievements made in China's reform and opening up in recent years have aroused their close attention. If China can succeed in creating a mature and typical sustainable agricultural development.
The model or the way to ensure the sustained, coordinated and rapid development of agriculture and the entire national economy has important reference significance for developing countries facing the same problems.
2) Domestic significance: First, it is conducive to better solve the two-way coordination of agricultural development and environmental protection, pay attention to the protection of resources and environment while developing the economy, so that resources and environment can sustainably support agricultural development, and at the same time, promote the effective protection of resources and environment through the development of agriculture, so that the development, utilization and protection of resources and the environment are organically combined, which not only avoids the cost of destroying resources and environment in agricultural development, but also avoids the simple emphasis on protection and hinders the development and utilization; Second, it is conducive to re-understanding the basic position and role of agriculture, so that the functions of agriculture can be continuously broadened, promote the comprehensive, comprehensive, and coordinated development of rural areas, increase rural employment, increase peasant incomes, and narrow the gap between urban and rural areas. Third, it is conducive to proceeding from China's national conditions, adjusting the strategy and direction of agricultural development, rationally developing and utilizing the environment, promoting the sustainable development of agriculture, and choosing a modern agricultural development path suited to China's national conditions.