Ethics and the Genetic Engineering of Food Animals

Biotechnology applied to traditional foodanimals raises ethical issues in three distinctcategories. First are a series of issues that arise inthe transformation of pigs, sheep, cattle and otherdomesticated farm animals for purposes that deviatesubstantially from food production, including forxenotransplantation or production of pharmaceuticals.Ethical analysis of these issues must draw upon theresources of medical ethics; categorizing them asagricultural biotechnologies is misleading. The secondseries of issues relate to animal welfare. Althoughone can stipulate a number of different philosophicalfoundations for the ethical assessment of welfare,most either converge on Bernard Rollins principle ofwelfare conservation (Rollin, 1995), or devolve intodebates over the ethical significance of animaltelos or species integrity. The principle of welfareconservation prohibits disfunctional geneticengineering of food animals, but would permit alteringanimals biological functions, especially when (as inmaking animals less susceptable to pain or suffering)do so improves an individual animals well being.Objections to precisely this last form of geneticengineering stress telos or species integrity asconstraints on modification of animals, and thisrepresents the third class of ethical issues. Most whohave formulated such arguments have failed to developcoherent positions, but the notion of species being,derived from the 19th century German tradition,presents a promising way to analyze the basis forresisting the transformation of animal natures.     

The challenge of sustainable tourism

The paradigm of sustainable tourism is discussed in terms of analysing what it actually means. Certain questions are raised and these include the means of its measurement, the question of intergenerational impacts and how these may be assessed, the determination of what exactly is meant by environment, the aspect of tourism as an industry and, with specific reference to tourism in the developing world, the potential for neocolonialism. It is argued that, although sustainable tourism may be a worthwhile goal, inherent problems in the definition and measurement of its success make it an elusive if not academic target. The challenge of sustainable tourism is to see it in a broader context as but one tool of development and to ensure that it is examined in the context of the local community as well as a global perspective.     

The search for the sustainable city in 20th century urban planning

Summary A new city has emerged in the 1990s, designed to achieve urban sustainability. The notion of sustainable urban form has its roots in the Garden City movement at the turn of the century. The garden cities of the 1900s and the ecological cities of the 1970s were proposed as alternatives to the pathology of modern urban form. Just as cities provide a place for humans to live, so they destroy ecosystems and become unfit habitats for the human spirit. The city must be made more vital, humane, efficient, beautiful, self-sufficient, and natural through a return to a more compact form, its impact on the environment must be decreased. These themes have re-emerged in the sustainable cities of the 1990s, advanced on behalf of future generations and planetary ecology. The sustainable city is a compact city. Calthorpe's Transit-Oriented Developments (1989) are hailed as sustainable because their walkable streets free residents from reliance on automobiles and their high density preserves surrounding wildlife habitat. The European Commission (EC) rests a sustainable future for Europe (1990) on the twin pillars of urban compactness and urban regeneration. Nash (1991) believes that sustainable global urbanization would consist of 1.5 billion humans living in 500 compact cities. He calls his vision Island Civilisation. The sustainable city is also a city of regenerative processes. Girardet (1990; 1992) thinks it has a circular metabolism, as distinguished from the linear metabolism of contemporary cities. McDonough (adviser to President Clinton on sustainable development) theorizes inThe Hannover Principles (1992) that in order to make civilization sustainable, urban form will have to be based on the principles of nature, which makes no waste, maximizes biodiversity and is sustained by the sun. The urban form designed by McDonald (1993), conceptualized with ideas from chaos theory, contemplates a sustainable city within a sustainable watershed and a form holistic, diverse, fractal and evolutionary. Lyle (1994) believes that the sustainable cities of the next century will be based on the green infrastructure of regenerative systems. The commonality linking these landmarks of sustainable urbanization is the ideal of bringing the city into a vital symbiosis with nature. The sustainable city is a green or living city. The search for the sustainable city in the 20th century has not been Utopian buttopian, a quest to create a form of city suited to optimal development of the Earth island.Andrew D. Basiago, an American lawyer and city planner, was a scholar in land economy at Cambridge. He is currently writing a book on solar cities.     

Forest and Farmland Conservation Effects of Oregon’s (USA) Land-Use Planning Program

Oregons land-use planning program is often cited as an exemplary approach to forest and farmland conservation, but analyses of its effectiveness are limited. This article examines Oregons land-use planning program using detailed spatial data describing building densities in western Oregon. An empirical model describes changes in building densities on forest and agricultural lands from 1974 to 1994, as a function of a gravity index of lands commuting distance to cities of various sizes, topographic characteristics, and zoning adopted under Oregons land-use planning program. The effectiveness of Oregons land-use planning program is evaluated based on the statistical significance of zoning variables and by computing estimated areas of forest and agricultural lands falling into undeveloped, low-density developed, and developed building density categories, with and without land-use zoning in effect. Results suggest that Oregons land-use planning program has provided a measurable degree of protection to forest and agricultural lands since its implementation.     

Assessing the ecosystem service of air pollutant removal by urban trees in Guangzhou (China)

In Chinese cities, air pollution has become a serious and aggravating environmental problem undermining the sustainability of urban ecosystems and the quality of urban life. Besides technical solutions to abate air pollution, urban vegetation is increasingly recognized as an alternative ameliorative method by removing some pollutants mainly through dry deposition process. This paper assesses the capability and monetary value of this ecosystem service in Guangzhou city in South China. The results indicated an annual removal of SO(2), NO(2) and total suspended particulates at about 312.03Mg, and the benefits were valued at RMB90.19 thousand (US$1.00=RMB8.26). More removal was realized by recreational land use due to a higher tree cover. Higher concentration of pollutants in the dry winter months induced more removal. The lower cost of pollution abatement in China generated a relatively subdued monetary value of this environmental benefit in comparison with developed countries. Younger districts with more extensive urban trees stripped more pollutants from the air, and this capacity was anticipated to increase further as their trees gradually reach final dimensions and establish a greater tree cover. Tree cover and pollutant concentration constitute the main factors in pollutant removal by urban trees. The efficiency of atmospheric cleansing by trees in congested Chinese cities could be improved by planting more trees other than shrubs or grass, diversifying species composition and biomass structure, and providing sound green space management. The implications for greenery design were discussed with a view to maximizing this ecosystem service in Chinese cities and other developing metropolises.     

A national strategy for environmental education: an approach to a sustainable future?

Chapter 36 of Agenda 21 called on each nation to bring together a widely cross-sectoral group of people to prepare a national strategy for environmental education and training. In Scotland this process had already begun and the Secretary of State's Working Group on Environmental Education presented him with its recommendations for a strategy in April 1993, which he accepted in a statement of intent in June, 1995. The process itself, the comments received on the report since publication and continuing developments in the field, have demonstrated the importance of adopting broad definitions for both environment and education, spreading involvement in production of the strategy to all sectors and as wide a range of individuals as possible, dividing up the work so as to focus on all the main contexts in which learning takes place, working with the main potential implementers and not depending entirely on the availability of new resources. The process was in itself rewarding and its importance should not be underestimated. The approach adopted and the issues which it raised appear to have wide applicability to similar programmes elsewhere. This paper describes the process adopted in preparing the strategy, reviews some of the subsequent developments in Scotland, and assesses the factors which may have contributed to its success so far.Professor John C. Smyth, OBE is Emeritus Professor of Biology at the University of Paisley. He is President of The Scottish Environmental Education Council and he presented this paper at the Global Forum '94 Academic Conference Towards a Sustainable Future: Promoting Sustainable Development, Manchester, UK.     

Testing the Use of a Land Cover Map for Habitat Ranking in Boreal Forests

Habitat loss and modification is one of the major threats to biodiversity and the preservation of conservation values. We use the term conservation value to mean the benefit of nature or habitats for species. The importance of identifying and preserving conservation values has increased with the decline in biodiversity and the adoption of more stringent environmental legislation. In this study, conservation values were considered in the context of land-use planning and the rapidly increasing demand for more accurate methods of predicting and identifying these values. We used a k-nearest neighbor interpreted satellite (Landsat TM) image classified in 61 classes to assess sites with potential conservation values at the regional and landscape planning scale. Classification was made at the National Land Survey of Finland for main tree species, timber volume, land-use type, and soil on the basis of spectral reflectance in satellite image together with broad numerical reference data. We used the number and rarity of vascular plant species observed in the field as indicators for potential conservation values. We assumed that significant differences in the species richness, rarity, or composition of flora among the classes interpreted in the satellite image would also mean a difference in conservation values among these classes. We found significant differences in species richness among the original satellite image classes. Many of the classes examined could be distinguished by the number of plant species. Species composition also differed correspondingly. Rare species were most abundant in old spruce forests (>200 m³/ha), raising the position of such forests in the ranking of categories according to conservation values. The original satellite image classification was correct for 70% of the sites studied. We concluded that interpreted satellite data can serve as a useful source for evaluating habitat categories on the basis of plant species richness and rarity. Recategorization of original satellite image classification into such new conservation value categories is challenging because of the variation in species composition among the new categories. However, it does not represent a major problem for the purposes of early-stage land-use planning. Benefits of interpreted satellite image recategorization as a rapid conservation value assessment tool for land-use planners would be great.     

Sewage as a resource: a case study of afforestation using sewage irrigation in Jaipur,Rajasthan, India

Summary Human beings use huge quantities of water every day for drinking, cleaning and various cultural functions and dispose of it as wastewater within sewage. With increase in population, the magnitude of this waste is multiplying enormously and beyond the recycling capacity of local ecosystems to become a major health and environmental hazard. Re-use of wastewater for afforestation purposes in the form of sewage silviculture combines the dual benefit of water conservation with environmental sanitation. Such experiments are being carried out at the World Forest Arboretum in Jaipur, Rajasthan, India. Biological treatment of the sewage before application, to improve its irrigational quality, to remove harmful chemicals and to prevent the risk of these passing into the human food chain is being undertaken. The aquatic weeds Lemna and Eichhornia are being used to purify the wastewater. The technique is both economically viable and ecologically sustainable.Dr Rajiv K. Sinha is assistant professor in Human Ecology at the University of Rajasthan.     

Risk-taking and environmental perception

This paper investigates the relationship between pupils' environmental perception (in terms of preservation and utilisation of nature) and personality (in terms of risk-taking). 713 secondary school pupils in Switzerland were investigated. Environmental perception was assessed via three factors: Preservation, Utilisation of Nature and Consideration for Conservation. Risk-taking was evaluated via six factors: Positive Risking, Ambivalence, Thrill in Gambling, Ineffective Control, Effective Control, and Anger Reaction. Analysis of the correlation matrix between Risk-taking and Environmental perception revealed three profiles (types): the high scorer on Preservation is the controlled and cautious gambler. The Utiliser (anthropocentric) profile is essentially a mirror image of the first: the Utiliser does not enjoy unpredictable risks, reacts with anger when risks fail and has little control over his/her own risk-taking behaviour. The Consideration for Conservation (ecocentric) profile assumes a position between these two profiles.     

Urban policy and environmental regeneration in two Scottish peripheral housing estates

Summary In the UK, particularly post-Second World War, urban renewal and decongestion programmes created peripheral housing estates. From the beginning these estates were not endowed with any sustaining social and economic life. Moreover, most of the residents were in the lower percentile of the urban poor, as well as being disadvantaged from a multiple perspective. Over the years, these estates have deteriorated socially, environmentally and economically. A number of limited efforts made in the past to improve the general well-being of the residents have not achieved appreciable success.In recent times, it has been recognised that only by a comprehensive approach can the peripheral estates be regenerated (or generated?). The New Life for Urban Scotland programme is aimed at doing this. This paper attempts to evaluate the impact of the programme of environmental improvement in Castlemilk and Ferguslie Park, both peripheral housing estates on the outskirts of Glasgow, Scotland. The impact areas studied are: land-use pattern and environmental quality; retail and shopping facility development; leisure and recreation; roads, streetscape and local transport services; environmental improvement expenditure. Some possible improvements in the programme are proposed for the future.Dr Sam C. Ofori undertook this study as part of a Master's Thesis with the School of Planning at the University of Central England.     

Predicting the Thermal Effects of Dam Removal on the Klamath River

The Klamath River once supported large runs of anadromous salmonids. Water temperature associated with multiple mainstem hydropower facilities might be one of many factors responsible for depressing Klamath salmon stocks. We combined a water quantity model and a water quality model to predict how removing the series of dams below Upper Klamath Lake might affect water temperatures, and ultimately fish survival, in the spawning and rearing portions of the mainstem Klamath. We calibrated the water quantity and quality models and applied them for the hydrometeorological conditions during a 40-year postdam period. Then, we hypothetically removed the dams and their impoundments from the models and reestimated the rivers water temperatures. The principal thermal effect of dam and reservoir removal would be to restore the timing (phase) of the rivers seasonal thermal signature by shifting it approximately 18 days earlier in the year, resulting in river temperatures that more rapidly track ambient air temperatures. Such a shift would likely cool thermal habitat conditions for adult fall chinook (Oncorhynchus tshawytscha) during upstream migration and benefit mainstem spawning. By contrast, spring and early summer temperatures could be warmer without dams, potentially harming chinook rearing and outmigration in the mainstem. Dam removal might affect the rivers thermal regime during certain conditions for over 200 km of the mainstem.     

A priority-ranking strategy for threatened species?

Summary The rate of extinction has accelerated to the point where we are probably losing one species per day right now, and we could well lose one million of Earth's 5–10 million species by the year 2000, and a good many more within the early decades of the next century. Plainly we cannot assist all species that face extinction within the foreseeable future. Conservationists have limited resources at their disposal, in the way of finance, scientific skills, and the like. Even were these resources to be increased several times over, we could not hope to save more than a proportion of all species that appear doomed to disappear: the processes of habitat disruption are too strongly underway to be halted in short order. But when we allocate funds to safeguard one species, we automatically deny those funds to other species. Already we support only a small fraction of all species under threat, and we may soon find ourselves in a situation where we can assist only a very marginal number of species facing extinction. Thus a key question arises: how are we to allocate our scarce resources in the most efficient way to safeguard species? Indeed we may now have reached a stage where there is merit in determining which species are most deserving of a place on the planet. Agonizing as it will be to make choices along these lines, conservation strategy should be as systematically selective as possible. This means that we should design analytic methodologies to enable us to assign our conservation resources to achieve maximum return in terms of numbers of species protected. In essence, a triage strategy. An expanded approach along these lines postulates a quantum advance in our planning of responses to the growing threatened-species problem: while the techniques of the past have certainly helped the situation, we cannot confront the much greater challenges of the future with an attitude of the same as before, only more so—the future will not be a simple extrapolation of the past, but will represent a qualitatively larger set of problems, which require an appropriately scaled-up response in our save-species campaigns.Dr Norman Myers is an expert in the study of endangered species and ecosystems. He is an international consultant in Environment and Development. This paper is based in part on findings of a project that he conducted for the World Wildlife Fund—US, to which grateful acknowledgment is made. The responsibility for all conclusions and recommendations remains, of course, with the author.     

Economic, social, and environmental sustainability in development theory and urban planning practice

In ten years, more than half the world's population will be living in cities. The United Nations (UN) has stated that this will threaten cities with social conflict, environmental degradation and the collapse of basic services. The economic, social, and environmental planning practices of societies embodying urban sustainability have been proposed as antidotes to these negative urban trends. Urban sustainability is a doctrine with diverse origins. The author believes that the alternative models of cultural development in Curitiba, Brazil, Kerala, India, and Nayarit, Mexico embody the integration and interlinkage of economic, social, and environmental sustainability. Curitiba has become a more livable city by building an efficient intra-urban bus system, expanding urban green space, and meeting the basic needs of the urban poor. Kerala has attained social harmony by emphasizing equitable resource distribution rather than consumption, by restraining reproduction, and by attacking divisions of race, caste, religion, and gender. Nayarit has sought to balance development with the environment by framing a nature-friendly development plan that protects natural systems from urban development and that involves the public in the development process. A detailed examination of these alternative cultural development models reveals a myriad of possible means by which economic, social, and environmental sustainability might be advanced in practice. The author concludes that while these examples from the developing world cannot be directly translated to cities in the developed world, they do indicate in a general sense the imaginative policies that any society must foster if it is to achieve urban sustainability.     

Teaching strategies for environmental education

Summary It is possible to distinguish four target groups for tertiary environmental education: the Technical Group, the Subject Specialist Group, the Management Group and the Lay Group. Each of these groups requires different sets of skills and abilities. The Technical Group needs to know how to measure environmental parameters. The Subject Specialist Group needs to know about environmental systems. The Management Group needs to have the skills and abilities to resolve complex environmental issues and problems. The Lay Group needs to have attitudes, philosophies and values about the environment. Each of these in turn require different teaching strategies. For the Technical Group, practical experimental teaching methods based on the traditional subject approach appear to be the most suitable. The Subject Specialist Group needs presentational methods based on either an infusion approach or a new subject approach. For the Management Group, a combination of high level disciplinary teaching combined with intensive short skills courses and more extensive junctions or environmental encounters, all of which make use of practice methods of teaching, are suggested. For the Lay Group, experiential methods, where the student's attitudes are challenged by experiences in either an in-service situation or through simulation exercises, seem to be most appropriate.Dr David Stokes is Dean of the Faculty of Applied Science and Head of the Department of Environmental Studies at Victoria College, and Bruce Crawshaw is currently a lecturer seconded to the Universiti Pertanian Malaysia.     

Environmental perceptions of Irish and Bavarian pupils: an empirical study

The present study deals with the evaluation of environmental/ecological perceptions of secondary school pupils. It has two major objectives. Firstly, to administer a measurement instrument to explore ecological/environmental perceptions for a sample of approximately 900 Irish secondary school pupils aged between 12 and 16 years. The operation and use of three subscales, environmental behaviour, utilization of nature and consideration for conservation, was based on a previous study undertaken in Bavaria, but its structure, dimensionality and reliability was further assessed using psychometric procedures. Secondly, the study monitored the differences in these dimensions between Irish and Bavarian pupils. Common items within the subscale structure were selected from both samples to form a truncated item selection and to function subsequently as the basis for the final factor analysis applied to the combined Irish–Bavarian sample. Comparisons on this basis indicated substantial differences in attitudes and environmental behaviour between pupils from both regions: the Irish sample favoured less conservational values, but more patronage for the utilization of nature and it revealed less willingness to take and plan action in individual environmental behaviour. In addition, the Irish sample disclosed a significantly greater gender difference in the two subscales.     

Interpreting countryside recreation: The urban - rural dichotomy

Summary Noting a paucity of sociological research investigating countryside recreation from an experiential perspective, this paper reports on a study aimed at exploring the meaning of such terms as the countryside, rural and natural as they are understood by the person-in-the-street. A typification of countryside recreation is constructed which suggests that individuals have an essentially simple understanding of the environment in this context which centres upon an urban-rural dichotomy. The urban setting is generally associated with negative experiences while the rural setting is regarded more positively. These attitudes suggest that the countryside represents a form of refuge from many stresses commonly associated with modern, urban lifestyles. An implication of this conclusion is that attempts to educate people into recognizing the links between their everyday behaviour and the degradation of the countryside will be met with considerable resistance since this would entail them in reconstruing their relationship with the environment.     

A course in Environmental Planning and Management

Summary This paper describes a 13-weeks, third-year course in Environmental Planning and Management developed and taught by the authors. Initiated in 1969, the course consists of a mix of lectures, seminars, workshop/laboratory sessions and field-based projects. The objectives of the course are for students: to become aware of the need for, and the complexities of, environmental management; to be able to criticise constructively work done by environmental agencies and consultants, managers and decision makers; and to learn and apply some of the methods and techniques used in environmental management.Topics covered by the current syllabus are: concepts of resource and environment; constitutional aspects; international law and the environment; Australian and Canadian environmental legislation and agencies; human manipulation of ecosystems; energy subsidies; modification of biogeochemical cycles; population dynamics and cropping; fisheries; national parks and reserves—policies in different countries; international heritage areas; environmental assessment (including impact assessment, land evaluation, land capability and land suitability assessment); and regional, integrated land-use and environmental planning and management. Techniques taught include: field surveys and interviewing; laboratory analysis of selected water quality, sediment and soil parameters including nutrient concentrations, heavy metal and pesticide residues; and for some students, applications of geographic information systems (GIS) technology following preceding GIS courses.A major problem is selecting the most appropriate mix between the social and natural sciences—appropriate, first in terms of students' heterogeneous skills and backgrounds, and second, in terms of understanding the causes of environmental problems and issues, and devising practicable solutions.     

Managing Urban Trees and Their Soil Envelopes in a Contiguously Developed City Environment

Urban Hong Kong is covered by high building, road, and population densities. Its urban morphology is inherently not conducive to extensive or high-grade greening. Recent renewal of old areas has squeezed out some limited interstitial plantable space, although in new development areas modest spaces have been earmarked for greenery. The study aims at evaluating the major constraints to urban trees and their companion urban soil envelopes and at providing specific recommendations to improve tree management in the city. The analysis covers the above-ground confinements that dampen tree performance, the less tangible but rather difficult institutional restrictions that impose a somewhat unnecessary lid on tree planting, the multiplicity of players and stakeholders involved in urban-tree management that militates against coordination and cooperation, the widespread occupation of underground space by utility lines often to the exclusion of trees, and the extremely poor quality of urban soils that are often used without amelioration to support tree growth. The management recommendations furnish practical suggestions and hints to improve the short- and long-term welfare of trees in terms of quality, quantity, and spatial distribution. The conclusion enumerates some concrete measures for consideration by decision-makers to upgrade the city's greenery to close the gap between science and policy.     

The terms genetic resource, biological resource, and biodiversity examined

The definitions of genetic resource, biological resource, and biodiversity show the existence of degrees of innacuracy, according to the versions considered. The increasing acceptance of inappropriate concepts in the realms of plant genetic resources and biological conservation prompts re-examination of the subject. The argument raised is that the establishment of defective concepts may undermine the foundations of scientific thought itself.     

Environmental Education: Biodiversity

Environmental education was a principal topic on the agenda of the Stockholm 1972 Conference. In response to its recommendation UNESCO and UNEP developed and launched the International Environmental Education Program (IEEP) in 1977. Environmental education was perceived to encompass in-school and out-of-school activities and public awareness. Later developments added training to its objectives and the concept of sustainable development to its dimensions. The international Convention on Biological Diversity (CBD) represented a phase in the world commitment to conservation of nature. It underpinned biodiversity in the fields of environmental education. Biodiversity education is based on five pivots: scale of boundaries (from local to worldwide), perspectives, goals, themes (vary according to actors), and assimilation (evaluation of programs of action). Directions relate to learners and teachers, and processes address: awareness, school education, education (and professional training) at tertiary level, roles of communication and media institutions.