This thesis will investigate the possibility of leasing as a 'greener' form of business transaction. With leasing, the customer pays for the service obtained form the product, but does not own the physical asset; ownership remains with the lessor. This has been claimed to increase resource productivity and close material loops. Numerous complications exist, however, such as tax regulations limiting operating leases to terms of 75% of the total product's life. In addition, no clear pattern has emerged in leasing practices, and in most cases manufacturers approach leasing on an ad hoc basis. Research has found that usage-phase impacts play a major role in determining the advantages realized by leasing. Products such as vehicles or refrigerators that continually consume energy negatively impact the environment much more during their use than during manufacturing or transportation. Because most lease agreements contain maintenance contracts, the opportunity to upgrade and increase product efficiency during this use-phase is paramount to reducing negative impacts. Remanufacturing also shows potential to further reduce resource requirements. However, if product efficiency is not improving significantly, remanufacturing alone does not make a significant impact. In some cases, such as carpets, remanufacturing is not practical, but recycling can be utilized. However, tax regulations require leased terms to be less than that of a product's designed life, hastening replacement. This has the potential to offset any advantages seen with a lease agreement. Academic work in this area remains very limited and product-specific. Case study analyses performed in this thesis found that increased product turnover can actually be environmentally beneficial when product technology is improving. These gains can be further improved with remanufacturing and optimized product replacement moderated by lease agreements. If usage energy is significantly less than manufacturing energy, leasing has little value for reducing impacts. Also leasing may motivate closed material loops, without improving product efficiencies there is no advantage to optimizing life cycles with lease contracts.

For decades scientists believed that herbivory had minimal impact on freshwater ecosystems. We now know that herbivory in freshwater systems equals or exceeds herbivory in terrestrial and marine systems. In extreme cases, herbivores can change clear, macrophyte dominated ecosystems into turbid plankton dominated ecosystems. Even though research on plant-herbivore interactions in freshwater systems has increased, there is still much that is unknown. This thesis is comprised of four studies investigating freshwater plant-herbivore interactions across multiple spatial scales. The first study investigated how induced chemical defenses in Cabomba caroliniana suppress herbivore consumption and growth as well as how this herbivore-generated change in plant chemistry affects the growth of plant associated microbes. At the spatial scale of individual ponds or lakes, consumers that induce their host plants may also be indirectly affecting other consumers and microbial pathogens via changes in this shared resource. The second study moves to an ecosystem scale and investigates how exotic versus native apple snails may impact Everglades' habitats. We investigated plant preference, consumption, growth and conversion efficiencies in the singly native apple snail to occur in the U.S. (Pomacea paludosa) versus four introduced species (P. canaliculata, P. insularum, P. haustrum and P. diffusa). We found that even though plant preferences are similar, invasive snails tend to eat more, grow more rapidly, and sometimes more efficiently than natives. This suggests that invasive species could have a large impact on the environment, especially the abundance of submerged plants. The third study investigated how palatability of freshwater plants varies with latitude (i.e. geographic scale). Increased herbivory at lower latitudes is hypothesized to select for increased plant defenses, which has been shown to be true for tropical forests, salt marshes, and seaweeds. When we contrasted eight confamilial plants collected in Indiana versus Southern Florida, three of four herbivores significantly preferred northern plants. When we evaluated a second set of plants collected from Indiana versus Central Florida, only one of three herbivores preferred the northern plants. Overall, our results suggest a preference for northern plants, but the strength of this relationship was variable. We hypothesize that this variability may be driven by 1) local variance in herbivore pressure that creates variance in plant defenses, and/or 2) the effect of winter length on the survival and feeding rate of herbivores. The final study expanded to a world scale, and investigated herbivore preference for native vs exotic plants. We found that both N. American crayfish and S. American snails preferred exotic plants over confamilial natives, despite responding to different plant characteristics. The single species of apple snail that occurs in N. American showed no preference for native or exotic plants from a N. American perspective, but instead exhibited preferences that correlated with its history of evolution in S. America. As the N. American species is a sister species of the S. American snails, feeding by the N. American snail appears more affected by its S. American lineage than its recent history in N. America. This suggests that phylogenetic legacy will affect choices of the herbivore as well as resistance or susceptibility of plants.

published_or_final_version / Urban Design / Master / Master of Urban Design

Employees at Statoil Canada participated in an action research, cooperative inquiry-based program that was designed to facilitate the reduction of their office environmental footprint. The program was designed using a combination of techniques that have been shown in previous studies to produce pro-environmental change. Almost 90% of participants that were offered the program opted to take part. During a 4-month period, participants set up individualized programs to reduce their environmental footprint in a manner of their own choosing. Results were collected both formally, through self-report data from a web-based Action Tracker, through 1 on 1 interviews and through a facilitated discussion and informally, through impromptu conversations, emails and observation. The data suggests that the program was effective in reducing environmental footprint, although it remains to be seen if the changes will be long lasting.

The end of the last century saw a meteoric rise in Environmental Impact Assessment (EIA) and its implementation worldwide subsequent to it being legislated by the United States in 1970. The South African Government's Council for the Environment attempted to emulate international developments in EIA and compiled the Integrated Environmental Management (IEM) guidelines of 1989 which delineated the procedure for undertaking EIAs for development projects in South Africa. It was envisaged that these guidelines would ultimately be made law. The period between 1989 and 1997 was a window period when the IEM guidelines were implemented voluntarily. This period therefore constitutes an important era in the history of EIA in South Africa to which constant reference is made and upon which further development in EIA in South Africa has been reliant. The period 1989 to 1997 also coincided with a major increase in the bulk electricity supply to KwaZulu-Natal by Eskom, the national electricity utility. Eskom had actively tracked the evolution of Environmental Management globally and was considered to be at the forefront of Industrial Environmental Management in South Africa and there was therefore an expectation that Eskom would implement the IEM guidelines. In this study twelve EIAs for Eskom powerlines and substations constructed in KZN for the period were analysed and trends in the implementation of the IEM guidelines extrapolated. This study highlights the extent to which the IEM guidelines were implemented. It discusses the problems attendant to its implementation, which were found to be common to the implementation of EIA globally. From this research it became clear that factors external to the IEM guidelines needed to be resolved before the IEM guidelines could be implemented. The administrative requirement was one of the most important and necessary requirements for successful implementation, but this had not been thoroughly anticipated by Eskom nor the guidelines themselves. This required that there was major reform to policy and company procedure, which had to be clearly understood and accepted, before IEM could be effectively implemented. As a consequence, the implementation of the various steps of the IEM guidelines seldom revealed consistent and satisfactory implementation. Even where the IEM guidelines were more closely followed and implemented, previously entrenched technocentrist procedures and ideals persisted and therefore IEM was subverted and implemented with the wrong goal in mind. There was also an expectation that there would be an improvement in EIA practice with time. It was found that there was a greater association between the quality of the EIA conducted and the Eskom Environmental Officer responsible for it, rather than a consistent improvement with time. Thus integration into the project process of environmental procedure is a complex process and it requires firstly that a company is reformed. Reform has subsequently begun to transpire in Eskom. This reform includes education of company employees, which in turn is linked to political will which is necessary to effect the changes required to apply a procedure such as the IEM guidelines. This study reviews the implementation of the IEM guidelines in Eskom during this important development phase. It therefore reflects on a key portion of the history of EIA implementation in this country. The study provides insight into organisational reform and the voluntary commitments required for successful implementation of EIA. Benefit can be drawn from this study for future implementation of EIA even though EIA legislation now exists, as some form of voluntariness, political will and organisational reform is always imperative for ETA's successful and effective implementation. / Thesis (M.Sc.)-University of Natal, Durban, 2003.

Inanda Dam situated near Durban in the Mngeni River, in the province of KwaZulu-Natal was completed in the late 1980s. As a typical large dam of the modern era, one major impact of the dam was the displacement and resettlement of over 1300 rural households living under communal ("tribal") tenure. Households were relocated to different places some kilometres away from their original places. These new relocation areas, where different tenure and other arrangements prevailed, then became their permanent residential location. This study was initiated to investigate two key issues. It sought to understand how the relocation altered the quality of life of removed families. It also sought to explore adaptation strategies adopted by the settlers and constraints to effective adaptation. Primary data were collected by means of in-depth interviews and direct observation of certain indicators of quality of life in the study area, over a period of five months. Fourteen households participated in the study. Simple quantitative methods were used to supplement the overall qualitative research design. Because of the small sample that was used, the study is perhaps not widely generalizable. However the study does provide insights into the long-term impacts of this inadequately mitigated displacement. It is also a case study of the nature of long-term environmental injustice and disruption associated with the construction of large dams. This is an injustice made worse by the political system of apartheid prevailing when the dam was planned and built. The general findings are that the dam did impact negatively on the quality of life of the displaced families. Thirteen years after compulsory relocation, the quality of life of several families has deteriorated instead of slowly improving. While the process of adaptation for some families has been easy, other families are still battling to reconstruct their livelihoods and quality of life. Where benefits of access to services such as potable piped water and electricity are enjoyed, these benefits are overshadowed by inability to pay and lack of access to other goods such as proper housing and adequate land. Loss of access to common property resources has meant a shift towards more money-based livelihood generation strategies. Constraints to adaptation are both internal and external. Low levels of socioeconomic status, poor access to environmental resources and the unfavourable political conditions in the relocation areas are some of the major constraints to effective adaptation. While the individual and group coping strategies employed have assisted families in the adaptation process, it is argued that the inadequacy of state support mechanisms significantly retarded the ability of households to adapt to life in the relocation areas. / Thesis (M.A.)-University of Natal, Durban, 2002.

Abstract not available. / Thesis (M.Soc.Sc.)-University of KwaZulu-Natal, Durban, 2012.

Ciliwung Watershed is the most developed area in Indonesia. However, development needs have caused overexploitation of the available resources, which have eventually caused deterioration of the environment of this watershed, and caused several areas to be more prone to natural hazards. This study develops certain Geographic Information System models to identify the physical-environmental characteristics of the watershed, in an attempt to avoid further improper resources utilization. These models yield the soil erosion critical areas, landslide potential areas, the spread of sea water intrusion, land subsidence potential areas, surface runoff characteristic, natural hazards prone areas, and groundwater recharge area.Based on these yielded characteristics, the general physical capability of this watershed can be delineated, which consists of five capability zones : Zone I, the flood prone area that also occupies by seawater intrusion and potential land subsidence areas; Zone II, the area that is affected by excessive groundwater withdrawal, which has sea water intrusion areas and prone to land subsidence; Zone III, the groundwater recharge area for Jakarta Plain; Zone IV, the most capable area for physical development; and Zone V, upper part of the watershed which has landslide potential areas, soil erosion critical areas, and volcanic eruption prone areas. / Department of Natural Resources

Bibliography: leaves 223-266. / xix, 306 leaves : ill. (some col.), maps ; 30 cm. / Title page, contents and abstract only. The complete thesis in print form is available from the University Library. / Experiments were conducted, based on the hypothesis that organic amendments held some promise for improvements of physical properties of acid-sulphate mine tailings and for the resulting acid drainage. Concerns the ability of various organic and inorganic materials to ameliorate materials from acid-sulphate mine tailings as collected at Brukunga, South Australia / Thesis (Ph.D.)--University of Adelaide, Depts. of Geology and Geophysics and Geographical & Environmental Studies, 2000?

Thesis (M. Env. St.)--University of Adelaide, Mawson Graduate Centre for Environmental Studies, 1992. / Includes bibliographical references (leaves 61-65).