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741.
Local government (LG) is increasingly playing a role in tackling environmental issues and promoting sustainability. An important element of this LG focus is sustainability education and engagement, yet only few details on the nature of these activities are evident. Similarly there is little understanding of the professional competencies required by LG staff to deliver the relevant sustainability education and engagement activities. A web-based survey of LG sustainability officers in the State of Victoria (Australia) provides insight into the focus of these officers’ work and the competencies they rely on. The findings seek to guide the training and employment of LG sustainability staff and the effective delivery of sustainability education and engagement activities. Broadly, the sustainability officers surveyed are closely involved with activities within their LG organisation, but are engaging less so with specific education institutions, organisational sectors and the community in general. In keeping with this, the major sustainability education and engagement focuses are collaboration with peers and stakeholders, rather than community-wide initiatives. For undertaking sustainability education and engagement activities, systems-thinking, anticipatory competence and normative competence were highlighted as important; however, strategic competence and interpersonal competence were considered most important. 相似文献
742.
For much of the world''s population, food is the major source of exposure to arsenic. Exposure to this non-essential metalloid at relatively low levels may be linked to a wide range of adverse health effects. Thus, evaluating foods as sources of exposure to arsenic is important in assessing risk and developing strategies that protect public health. Although most emphasis has been placed on inorganic arsenic as human carcinogen and toxicant, an array of arsenic-containing species are found in plants and animals used as foods. Here, we 2evaluate the contribution of complex organic arsenicals (arsenosugars, arsenolipids, and trimethylarsonium compounds) that are found in foods and consider their origins, metabolism, and potential toxicity. Commonalities in the metabolism of arsenosugars and arsenolipids lead to the production of di-methylated arsenicals which are known to exert many toxic effects. Evaluating foods as sources of exposure to these complex organic arsenicals and understanding the formation of reactive metabolites may be critical in assessing their contribution to aggregate exposure to arsenic. 相似文献
743.
744.
Thomas Jacob Jrmy Rohmer Jean‐Charles Manceau 《Greenhouse Gases: Science and Technology》2016,6(1):34-54
This numerical study focuses on the inversion of the CO2 plume shape and stored mass amount from both surface and borehole time‐lapse gravity simulated measurements in saline aquifers. Solving for the density distribution at depth and hence the shape of the plume is an ill‐posed inverse problem which requires regularization. We opt for regularized least‐square inversion, using both L‐Curve and general cross validation methods to obtain the regularization parameter. Numerical inversion experiments are set up by modeling the spatial distribution of injected gaseous CO2 using a 1D radial transport model, which allows testing for both injected mass amount and injection depth. We find that including surface data alone, the error on the position of the inverted plume is of the order of ∼30% for the shallowest aquifer depths of 800 to 1200 m and for injected CO2 mass larger than 10 Mt. The positioning error increases as depth increases and injection mass decreases. The addition of measurements from a single borehole to surface measurements, though stabilizing the inversion, only reduces the error on the position by a mere 5%. However, while the positioning error is high, the real CO2 mass within the inverted CO2 plume area is close to the total injected CO2 mass, with more than 90% of the injected mass being captured using surface and borehole data with the L‐Curve method. This relatively high mass ratio shows that this method can be used to detect the main bulk of the injected CO2 plume. © 2015 Society of Chemical Industry and John Wiley & Sons, Ltd 相似文献
745.
Kristen C. Ruegg Ryan J. Harrigan James F. Saracco Thomas B. Smith Caz M. Taylor 《Conservation biology》2020,34(6):1482-1491
Migratory animals are declining worldwide and coordinated conservation efforts are needed to reverse current trends. We devised a novel genoscape-network model that combines genetic analyses with species distribution modeling and demographic data to overcome challenges with conceptualizing alternative risk factors in migratory species across their full annual cycle. We applied our method to the long distance, Neotropical migratory bird, Wilson's Warbler (Cardellina pusilla). Despite a lack of data from some wintering locations, we demonstrated how the results can be used to help prioritize conservation of breeding and wintering areas. For example, we showed that when genetic, demographic, and network modeling results were considered together it became clear that conservation recommendations will differ depending on whether the goal is to preserve unique genetic lineages or the largest number of birds per unit area. More specifically, if preservation of genetic lineages is the goal, then limited resources should be focused on preserving habitat in the California Sierra, Basin Rockies, or Coastal California, where the 3 most vulnerable genetic lineages breed, or in western Mexico, where 2 of the 3 most vulnerable lineages overwinter. Alternatively, if preservation of the largest number of individuals per unit area is the goal, then limited conservation dollars should be placed in the Pacific Northwest or Central America, where densities are estimated to be the highest. Overall, our results demonstrated the utility of adopting a genetically based network model for integrating multiple types of data across vast geographic scales and better inform conservation decision-making for migratory animals. 相似文献
746.
Ryan Thomas Kristen Jenkins Beth Landale Grant Trigger Thomas M. Holsen Sophia Dore Donald Pope Jennifer Wasielewski 《补救:环境净化治理成本、技术与工艺杂志》2020,30(3):27-37
A bench‐scale treatability study was performed to evaluate the effectiveness of alkaline ozonation on removing per‐ and polyfluoroalkyl substances (PFAS) present in groundwater at a former industrial site in Michigan. The study involved testing the PFAS‐impacted groundwater under alkaline ozonating conditions under a range of experimental conditions, including modifying pH, hydrogen peroxide‐to‐ozone molar ratio doses, length of ozonation pretreatment times, and sampling techniques. PFAS‐spiked samples were used to determine if inorganic ions such as fluoride (F?), sulfate (SO42?), formate (HCOO?), acetate (CH3COO?), and trifluoroacetate (CF3COO?) were generated or if there were decreases in total organic fluorine resulting from PFAS treatment. The results from all tests indicate that decreases in PFAS concentrations were due to a combination of removal and destructive mechanisms with enhanced removal under acidic pH ozonation pretreatment conditions. Short‐chain PFAS concentrations increased during the experiments followed by an overall decrease in concentration under continuous alkaline ozonation conditions. Reductions in concentrations in perfluorooctane sulfonic acid of 75–97% were observed. Reductions in concentrations were also observed in other PFAS such as 6:2 FTS, PFHxS, PFOA, and PFNA. To our best knowledge, this is the first time that alkaline ozonation has been performed on PFAS‐impacted water while monitoring a larger suite of PFAS analytes in addition to destruction byproducts. Treatment of PFAS under the conditions discussed in this paper suggests that alkaline ozonation may be a viable remediation option for PFAS‐impacted waters. 相似文献
747.
Thomas A. Tsalis Kyveli E. Malamateniou Dimitrios Koulouriotis Ioannis E. Nikolaou 《Corporate Social Responsibility and Environmental Management》2020,27(4):1617-1629
Complying with the requirements of sustainability development is a very high priority for the business community. The United Nations' 2030 Agenda and its 17 Sustainable Development Goals (UN_SDGs) pose new challenges for firms, which have to adjust their operations and strategies to the requirements of SDGs. In this context, this paper aims to develop a methodological framework for evaluating the level of alignment of corporate sustainability reporting practices with the scope of UN_SDGs. Based on disclosure topics from Global Reporting Initiative and a scoring system, an evaluation framework was developed in order to assess the quality of information published in sustainability reports with respect to each UN_SDG. An empirical analysis was performed in a sample of sustainability reports in order to examine the structure and the applicability of the proposed methodological framework. The outcomes of the empirical analysis reflect some implications for future research on the UN_SDG reporting practices. 相似文献
748.
749.
This paper addresses the compatibility of World Bank policies towards population growth, development and biodiversity in the Third World. The World Bank has been central to the design and implementation of the Global Environment Facility (GEF), the remit of which includes the conservation of global biodiversity. However, the Bank's influence over the facility has in itself created controversy which may undermine its effectiveness. More significantly, the Bank's commitment to the GEF is subverted by its policies in other social and economic sectors. The World Bank, together with the International Monetary Fund (IMF), directs the structural adjustment of Third World economies through economic deregulation and privatization. This approach exacerbates inequalities and further empowers large landowners who may then displace tenant farmers and claim exclusive rights to former common land. Thus, biodiversity loss occurs as large landowners reorientate the land use towards the production of export goods and dispossessed farmers invade marginal land. Population growth influences biodiversity loss through its contribution to agricultural intensification and the settlement of marginal land. The World Bank encourages this trend through its non-committal approach to population control, but more especially through structural adjustment's positive effect on fertility. 相似文献
750.
Holm PE Rootzén H Borggaard OK Møberg JP Christensen TH 《Journal of environmental quality》2003,32(1):138-145
Cadmium (Cd) distribution between the soil solid phase and the soil solution is a key issue in assessing the environmental effect of Cd in the terrestrial environmental. Previous studies have shown that many individual minerals and other components found in soils can bind Cd, but most studies on whole soil samples have shown that pH is the main parameter controlling the distribution. To identify further the components that are important for Cd binding in soil we measured Cd distribution coefficients (Kd) at two fixed pH values and at low Cd loadings for 49 soils sampled in Denmark. The Kd values for Cd ranged from 5 to 3000 L kg(-1). The soils were described pedologically and characterized in detail (22 parameters) including determination of contents of the various minerals in the clay fraction. Correlating parameters were grouped and step-wise regression analysis revealed that the organic carbon content was a significant variable at both pH values. Cation exchange capacity (CEC) and gibbsite were important at the low pH (5.3) while iron oxides also were important at the high pH (6.7). None of the other clay minerals present in the soils (illite, smectite, kaolinite, hydroxy interlayered clay minerals [HIM], chlorite, quartz, microcline, plagioclase) were significant in explaining the Cd distribution coefficient. 相似文献