Fine sediment particle microscopic characteristics, bioavailable phosphorus and environmental effects in the world largest reservoir

2020 ◽  
Vol 265 ◽  
pp. 114917
Author(s):  
Xiaoxiao Wang ◽  
Jun Zhou ◽  
Yanhong Wu ◽  
Roland Bol ◽  
Yong Wu ◽  
...  
2002 ◽  
Vol 2 (2) ◽  
pp. 92-115 ◽  
Author(s):  
Arthur P. J. Mol

This paper explores what an ecological modernization perspective has to offer in an era marked by globalization. Globalization processes and dynamics are mostly seen as detrimental to the environment. The point that an ecological modernization perspective puts on the research agenda is that, although global capitalism has not been beaten and continues to show its devastating environmental effects in all corners of the world, we are moving beyond the era of a global treadmill of production that only further degrades the environment. More or less powerful, reflexive, countervailing powers are beginning to move towards environmental reform. And these powers are no longer limited to a small environmental movement that only reacts to the constant undermining of society's sustenance base. In analyzing these countervailing forces, the paper also explores the consequences of globalization processes for ecological modernization ideas and perspectives.


1975 ◽  
Vol 2 (1) ◽  
pp. 47-51 ◽  
Author(s):  
George A. Petrides

A preliminary survey of thirteen Latin American nations indicated that both the number and rate of importations of wild hoofed animals from Europe, Asia, and Africa, has increased rapidly in recent years. This is especially true for Mexico, Argentina, and Chile. In nearly every instance reported, the original stock of hoofed game was held under fence and no importer intended that animals should escape from his control. From these and other instances around the world, it seems that eventual escapes of captive ungulates held under normal ranching conditions are a virtual certainty. As the full effects of imported species on the plants and animals in their new environment cannot be predicted with certainty, guideline principles to govern species introductions are sorely needed.


2016 ◽  
Vol 2016 ◽  
pp. 1-13
Author(s):  
Hyangsook Lee ◽  
Kang-Dae Lee ◽  
Sangho Choo

Maritime freight shipping has increased significantly and air pollution from international ships has grown accordingly, having serious environmental effects all over the world. This paper analyzes the effects of the emission cost on ocean route choices, focusing on international container ships. First, the paper formulates a freight network model that captures decisions and interactions of ocean carriers and port terminal operators in the maritime freight transport system. Then, the emission cost is calculated based on an activity-based approach as a component of the ocean transportation cost function. A case study is examined to find if the emission cost affects ocean route choices. The results indicate that the optimal ocean route and transportation cost are changed distinctively due to the emission cost. The research discusses how the emission cost plays a role in route changes and why ocean carriers have to consider these costs in their routing decisions.


2021 ◽  
Vol 2021 ◽  
pp. 1-7
Author(s):  
Jaeyoung Lee ◽  
Suyi Mao ◽  
Mohamed Abdel-Aty ◽  
Yanqi Lian ◽  
Lishengsha Yue ◽  
...  

There have been efforts to restrict older trucks in many jurisdictions all over the world. The primary goal of the restrictions is to minimize greenhouse gas emissions. In addition to the environmental benefits, it is also possible that the truck age restriction could contribute to the enhancement of traffic safety. Older trucks are subject to longer travel-miles than newer trucks and tend to have higher mechanical failure rates. Extremely few studies have been done to explore the impact of trucks’ age on their crash occurrence due to mechanical problems. This study aims to investigate the association between the truck crashes due to mechanical issues and the truck age. Two approaches are adopted to achieve the objective. First, a chi-square test reveals that the proportions of the mechanical failures among older trucks are higher than those among newer ones ( χ 2  = 256.199, p < 0.0001 ). Second, the modeling results indicate that the number of truck crashes due to mechanical failures is significantly increased by the truck age. The findings suggest that policies restricting older trucks should consider not only environmental effects but also traffic safety benefits.


2018 ◽  
Vol 51 ◽  
pp. 02001
Author(s):  
T Younas ◽  
H Rasheed ◽  
M M Rehman ◽  
R Ramzan

The development of solar power technologies is considered to be the key solutions for fulfilling ever increasing worldwide demand for energy. This paper reflects the nature, characteristics, similarities, and differences between nuclear and solar energies. It also discusses their technologies, their impact on different aspects of life and public attitudes about them. Generally, nuclear energy is considered to be destroyed due to uncontrollable chemical reactions associated with harvesting of nuclear energy. Energy requirement of the world is increasing day by day, and using conventional methods to fulfil this requirement might cause devastating effects on atmosphere due to an emission of different harmful by-products released. In this paper, alternate methods of producing energy are discussed and a detailed analysis of its environmental effects, sustainability and cost have been discussed.


Author(s):  
Diego Silva Garzón

Industrial agriculture has promoted the expansion of monocrops around the world, aided by the circulation of highly standardized plant varieties. However, given the adverse environmental effects of this agricultural approach (such as genetic erosion) and the challenges posed by climate change, some biotech companies are trying to complexify industrial agriculture’s relationship to “place”. They are beginning to consider local particularities in the design of seed products. Focusing on the experience of an Argentinian biotech company, this article explores the creation of microbial seed treatments that claim to be “region-specific” and whose production is mediated by novel meta-genomic techniques. Through the notions of association and mediation, the article reflects on the diverse meanings of region-specificity (geographical, environmental, relational) that are mobilized in the creation of these products. In this way, the article highlights the role of computational technologies, plants, and microorganisms in the shaping of scientific and corporate meanings of place.


Author(s):  
Stephanus Mentz ◽  
Mehdi Mehrabi ◽  
Mohsen Sharifpur ◽  
Josua P. Meyer

Desalination systems based on the Humidification Dehumidification (HDH) process come in a large variety of forms. They all operate in very similar manners, all requiring the evaporation of salt water and the condensation of pure, distilled water, in the same way clouds are formed every day. As engineers we must pursue the processes that have the best possible efficiency for the specific situation we find ourselves in. The purpose of this paper is to explore the various Humidification Dehumidification desalination processes and thermodynamically compare them with one another in order to determine which one of these processes has the most potential in specific environmental situations. This paper explores the advantages and disadvantages of all HDH processes as well as compare them with more common desalination methods like reverse osmosis. An in depth study of available literature is conducted, listed and explained regarding these HDH processes and their specific characteristics, focusing on the key points of efficiency, limiting factors and environmental effects. In some cases these processes, especially those utilizing the open air cycle or solar collectors, can be severely affected by environmental situations. The environmental situations can include high humidity environments, high temperature environments, high rainfall environments and of course the polar opposites of these situations and any combination of them. The paper takes into account these environmental effects and makes recommendations based on different environmental situations that can be found around the world. The HDH processes can obtain the energy they need to operate from various sources. Recommendations are also made with this in mind. Recommendations are also made regarding possible processes and specific design areas, which, in the in the writers opinion, should be the focus of improvements made by future designers are noted. Considering the efficiency limiting areas that cause bottlenecks in the processes, the writer prescribes possible ways to limit the effects of these bottleneck areas. The writer’s own recommendations regarding possible processes and possible improvements are also stated, paying attention to the recommendations already found in literature.


Author(s):  
Sankara Papavinasam ◽  
Alex Doiron ◽  
R. Winston Revie

Producing pipelines are protected from internal corrosion by the application of corrosion inhibitors. Environmental effects of corrosion inhibitors have received increased attention in recent years, especially for offshore pipelines. In response to the drive for more environmentally friendly inhibitors, several “green” corrosion inhibitors have been developed. In the design of new classes of corrosion inhibitors, there is a need to take into account the various environmental regulations that exist. In this paper, the criteria for selecting green inhibitors as used in various part of the world are reviewed. The current test methods, their reproducibility and effectiveness, and their accuracy in relation to the selection of green inhibitors are discussed.


2018 ◽  
Vol 51 ◽  
pp. 02001
Author(s):  
T Younas ◽  
H Rasheed ◽  
M M Rehman ◽  
R Ramzan

The development of solar power technologies is considered to be the key solutions for fulfilling ever increasing worldwide demand for energy. This paper reflects the nature, characteristics, similarities, and differences between nuclear and solar energies. It also discusses their technologies, their impact on different aspects of life and public attitudes about them. Generally, nuclear energy is considered to be destroyed due to uncontrollable chemical reactions associated with harvesting of nuclear energy. Energy requirement of the world is increasing day by day, and using conventional methods to fulfil this requirement might cause devastating effects on atmosphere due to an emission of different harmful by-products released. In this paper, alternate methods of producing energy are discussed and a detailed analysis of its environmental effects, sustainability and cost have been discussed.


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