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891.
892.
Blessings?ChinsingaEmail author Michael?Chasukwa Sane?Pashane?Zuka 《Journal of Agricultural and Environmental Ethics》2013,26(6):1065-1084
Though a recent phenomenon, land grabs have generated considerable debate that remains highly polarized. In this debate, one view presents land deals as a path to sustainable and transformative rural development through capital accumulation, infrastructural development, technology transfer, and job creation while the alternative view sees land grabs as a new wave of neo-colonization, exploitation, and domination. The underlying argument, at least theoretically, is that international land deals unlock the much needed capital to accelerate the achievement of sustainable and transformative rural development in developing countries. It is against this backdrop that this paper examines the contribution of large scale land deals in Malawi to rural development by employing the political economy perspective using the Limphasa Sugar Corporation as a case study with particular focus on the nature and interest of the actors involved; the legal framework supporting large scale land deals; major individual and community benefits; and the extent to which these large land deals can indeed bring about sustainable and transformative rural development. The findings of this article demonstrate that large scale land deals present short term benefits to local communities such as capital for rural development; technology transfer and job creation in exchange for the priceless economic and social capital that local people depend upon; destruction of local social systems; deepening of local communities’ vulnerability to economic shocks; and the entrenchment of community dependence that may in the long run result in social and political unrest. 相似文献
893.
Myriam?MeradEmail author Nicolas?Dechy Frédéric?Marcel Igor?Linkov 《The Environmentalist》2013,33(2):305-321
Past and present disasters and scandals, such as the BP Deepwater Horizon oil disaster in the Gulf of Mexico in 2010, the Servier Mediator (Benfluorex) scandal in 2009 and the Enron collapse in 2001, have uncovered weaknesses in governance issues. The authors argue that there is a need to develop methods and tools to diagnose and assess the governance of organizations with respect to Sustainable Development (SD). However, this task remains difficult due to the fact that it is difficult to appraise the quality of governance. The authors propose a protocol to diagnose and analyze the governance of SD and explore the use of multiple-criteria decision-aiding methods to achieve this task. Two aggregation methods to assess the global governance are proposed: (1) The identification of a final governance index for an Organization. This method helps in establishing a global diagnosis of the quality of the governance of an Organization with respect to SD challenges. The governance index is based on the calculation of three indexes: the partial opportunity index, the partial risk index and the partial equilibrium index. (2) The ranking of a set of Organizations according to their governance of SD. This method aims at assessing a set of Organizations based on a pairwise comparison according to a set of criteria that represents the seven domains of the ISO 26000 norm (ISO 26000—Guidance on social responsibility, 2010). This method is based on the outranking aggregation approach ELECTRE III. A practical example is used to illustrate two methods of governance assessment. 相似文献
894.
The vegetable wastes and flower stems were co-digested to evaluate the anaerobic hydrolysis performance of difficultly biodegradable organic wastes by introducing readily biodegradable organic wastes. The experiments were carried out in batches. When the vegetable wastes were mixed with the flower stems at the dry weight ratio of 1 to 13, the overall hydrolysis rate increased by 8%, 12%, and 2% according to the carbon, nitrogen, and total solid (TS) conversion rate, respectively. While the dry weight ratio was designed as 1 to 3, there was a respective rise of 5%, 15%, and 4% in the conversion rate of carbon, nitrogen, and TS. The enhancement of anaerobic hydrolysis from the mixed vegetable wastes and flower stems can be attributed to the formation of volatile fatty acids (VFA) and nutrient supplement like nitrogen content. The maximum VFA concentration can achieve 1.7 g/L owing to the rapid acidification of vegetable wastes, loosing the structure of lignocellulose materials. The statistic bivariate analysis revealed that the hydrolysis performance was significantly related to the physical and biochemical compositions of the feeding substrate. Especially, the soluble carbon concentration in the liquid was significantly positively correlated to the concentration of nitrogen and hemicellulose, and negatively correlated to the concentration of carbon and lignocellulose in the feeding substrate, suggesting that the regulation and control of feedstock can have an important influence on the anaerobic hydrolysis of organic wastes. 相似文献
895.
1 问题的提出
胜利油田各培训机构多年来为油田培养了大批的专业人才。但是,目前安全教育培训仍然采用传统的面对面的教学管理方式,培训计划、培训人员、办班情况、培训内容、成绩单等信息均采用人工记录,上报安全处、劳资处等管理部门的材料还是采用传统的纸质材料,工作效率受到限制。 相似文献
896.
Effects of grazing and fencing on carbon and nitrogen reserves in plants and soils of alpine meadow in the three headwater resource regions 总被引:1,自引:0,他引:1
Knowledge about carbon and nitrogen in plants and soils and response to fence and graze in alpine ecosystems is still rudimentary because of extremely geographic situation. The purpose of this study was to compare the difference among carbon, nitrogen concentration, and content of unit area and dynamics of above- and below-ground biomass, soil organic carbon and total nitrogen between fencing and grazing alpine meadow. The results showed that total carbon and C: N radio in the aboveground tissue were significantly higher in fenced and ungrazing grassland (FU) than those in free grazing grassland (FG). In addition, the order of total carbon and nitrogen concentration of aboveground tissue of different function groups were not identical between them; The total carbon storage (TCS) per unit of aboveground tissue, roots and 0–30 cm soil layer increased after being fenced for 5 years from free grazing grassland (9255.17 g/m2) to fenced and ungrazing grassland (12637.10 g/m2) by 26.79%. The corresponding total nitrogen storage (TNS) increased by 751.42 g/m2. Furthermore over 95% TCS (TNS) come from 0–30 cm soil layer. However there were no significant differences between fenced and ungrazing grasslands of 10 years and 5 years. Therefore fenced to exclude grazing by Tibetan sheep and yaks was an alternative approach to sequester C to the soil in alpine meadow systems. 相似文献
897.
Abstract China has won the name of the world factory being famous for exporting a great deal of and various kinds of low-price merchandise. However, most of Chinese exports are primary goods or manufactured products that create heavy pollution and require intensive use of resources. Chinese products go abroad, but their following harms stay behind. The article analyzes many obvious low-price facts in China and their concomitant terrible environmental results in detail, and points out that there are huge hidden troubles in the way of China's sustainable development behind her seemingly flourishing economy. 相似文献
898.
ABSTRACTAs the space carrier of the construction of ecological civilization, land’s green and efficient utilization is an important guarantee for realizing national sustainable development. Based on traditional land evaluation, this paper scientifically defines the green land use, puts land as one of the production factors, and brings energy consumption, environmental pollution, etc. into the input-output system to measure the green land utilization efficiency of the urban construction land of Beijing-Tianjin-Hebei Urban Agglomeration from 2006 to 2016. The study shows that the overall efficiency variation of the urban agglomeration is related with the land and environment policies. Efficiency of 2016 is higher than that of 2006, and energy and environment are the principal factors affecting the green land use. The efficiency of each city is positively correlated with its economic development, negatively correlated with the construction land expansion. Efficiency gaps in different cities are expanding. There is positive correlation with overall weak space between cities, and the partial spatial agglomeration phenomenon appears. Therefore, the green land use efficiency could be improved by improving land utilization efficiency, coordinating economic growth of construction land utilization with environmental protection and taking feasible ways to transregional renovation of the stock ecological land utilization, etc. 相似文献
899.
Medusahead (Taeniatherum caput-medusae (L.) Nevski) is an exotic annual grass invading rangelands in the western United States. Medusahead is a serious management
concern because it decreases biodiversity, reduces livestock forage production, and degrades the ecological function of rangelands.
Despite the obvious importance of ranchers as partners in preventing and managing medusahead in rangelands, little is known
about their perceptions and behaviors concerning medusahead management. We present the results of a survey of ranchers operating
on sagebrush steppe rangeland in a three-county area in southeast Oregon encompassing over 7.2 million ha. The primary objective
of this research was to determine if the presence of medusahead on a ranch influenced its operator’s perceptions and behaviors
concerning invasive plant control and prevention. Ranchers operating on medusahead-infested rangeland were more likely to
indicate increased awareness and concern about medusahead and the potential for its continued expansion. Ranchers operating
on rangeland invaded by medusahead were also more likely to indicate use of measures to prevent the spread of medusahead and
other invasive plants on rangeland, interest in educational opportunities concerning invasive annual grass management, and
plans for controlling invasive annual grasses in the future. This study revealed an alarming trend in which individuals are
less likely to implement important prevention measures and participate in education opportunities to improve their knowledge
of invasive plants until they directly experience the negative consequences of invasion. Information campaigns on invasive
plants and their impacts may rectify this problem; however, appropriate delivery methods are critical for success. Web- or
computer-based invasive plant information and tools were largely unpopular among ranchers, whereas traditional forms of information
delivery including brochures/pamphlets and face-to-face interaction were preferred. However, in the future web- or computer-based
information may become more popular as ranchers become more familiar with them. 相似文献
900.
Maintaining the Conservation Value of Shifting Cultivation Landscapes Requires Spatially Explicit Interventions 总被引:1,自引:0,他引:1
Fallow vegetation within landscapes dominated by shifting cultivation represents a woody species pool of critical importance
with considerable potential for biodiversity conservation. Here, through the analysis of factors that influence the early
stages of fallow vegetation regrowth in two contrasting forest margin landscapes in Southern Cameroon, we assessed the impact
of current trends of land use intensification and expansion of the cultivated areas, upon the conservation potential of shifting
cultivation landscapes. We combined the analysis of plot and landscape scale factors and identified a complex set of variables
that influence fallow regrowth processes in particular the characteristics of the agricultural matrix and the distance from
forest. Overall we observed a decline in the fallow species pool, with composition becoming increasingly dominated by species
adapted to recurrent disturbance. It is clear that without intervention and if present intensification trends continue, the
potential of fallow vegetation to contribute to biodiversity conservation declines because of a reduced capacity, (1) to recover
forest vegetation with anything like its original species composition, (2) to connect less disturbed forest patches for forest
dependent organisms. Strategies to combat biodiversity loss, including promotion of agroforestry practices and the increase
of old secondary forest cover, will need not only to operate at a landscape scale but also to be spatially explicit, reflecting
the spatial pattern of species reservoirs and dispersal strategies and human usage across landscapes. 相似文献