全文获取类型
收费全文 | 1388篇 |
免费 | 19篇 |
国内免费 | 17篇 |
专业分类
安全科学 | 52篇 |
废物处理 | 73篇 |
环保管理 | 167篇 |
综合类 | 249篇 |
基础理论 | 231篇 |
环境理论 | 1篇 |
污染及防治 | 464篇 |
评价与监测 | 107篇 |
社会与环境 | 64篇 |
灾害及防治 | 16篇 |
出版年
2023年 | 22篇 |
2022年 | 32篇 |
2021年 | 46篇 |
2020年 | 35篇 |
2019年 | 31篇 |
2018年 | 57篇 |
2017年 | 63篇 |
2016年 | 74篇 |
2015年 | 52篇 |
2014年 | 84篇 |
2013年 | 96篇 |
2012年 | 82篇 |
2011年 | 118篇 |
2010年 | 82篇 |
2009年 | 58篇 |
2008年 | 85篇 |
2007年 | 80篇 |
2006年 | 80篇 |
2005年 | 57篇 |
2004年 | 46篇 |
2003年 | 25篇 |
2002年 | 27篇 |
2001年 | 14篇 |
2000年 | 9篇 |
1999年 | 6篇 |
1998年 | 4篇 |
1997年 | 8篇 |
1996年 | 3篇 |
1995年 | 6篇 |
1994年 | 4篇 |
1993年 | 5篇 |
1992年 | 2篇 |
1991年 | 2篇 |
1989年 | 2篇 |
1988年 | 2篇 |
1986年 | 3篇 |
1985年 | 2篇 |
1984年 | 2篇 |
1975年 | 1篇 |
1966年 | 1篇 |
1963年 | 1篇 |
1961年 | 1篇 |
1960年 | 1篇 |
1959年 | 1篇 |
1958年 | 1篇 |
1957年 | 1篇 |
1955年 | 1篇 |
1954年 | 3篇 |
1951年 | 1篇 |
1936年 | 1篇 |
排序方式: 共有1424条查询结果,搜索用时 15 毫秒
991.
Gerba Leta Girma Kelboro Till Stellmacher Kristof Van Assche Anna‐Katharina Hornidge 《Natural resources forum》2018,42(2):93-107
A public mobilization approach known as nikinake drives implementation and technology upscaling in Ethiopia's agricultural extension. This study investigates and describes the processes and effectiveness of nikinake as an extension method used for natural resource management (NRM). The paper draws on empirical field research conducted in Oromia and the southern region of Ethiopia by looking at nikinake in the context of a watershed management campaign in 2015 and 2016. Nikinake is used as an approach to mobilize the public and to promote the skills of farmers and development actors. In principle, the implementation of NRM is voluntary; however, it is largely planned top‐down and enforced through state actors and informal institutions. This study suggests effective integration of social mobilization with reliable extension and a paradigm shift in emphasis from spatial coverage to an effective outcome. Additionally, sustainability and scalability of NRM interventions could be ameliorated by improving experts’ technical skills, raising farmers’ awareness, improving an incentive system, building trust, and better integrating past watershed management and future planning activities. We reflect on the significance of the nikinake experience in Ethiopia for a broader theory of extension‐as‐mobilization for rural development. From the Ethiopian case, a more general recommendation emerges for extension‐as‐mobilization schemes. For long‐term development, it is worthwhile to consider the fit between yearly campaigns as ad hoc project organizations and the existing pattern of actors and institutions responsible for rural development. 相似文献
992.
Prescribed burning is now a widely accepted bushfire hazard management strategy. While evidence points to reduced levels of public health harm compared to severe bushfire, smoke created by planned burns remains a community concern with need for evidence-based public health management. Findings are presented from an Australian study of community experiences of prescribed burns, associated smoke, and public health communications. We find that “place” influences how information is received and used for the management of the effects of planned burns; and that this is significant for human agency and community resilience. We provide recommendations for public health management. 相似文献
993.
Treatment of effluent from re‐refined lubricating oils by combined processes of coagulation,flocculation, and Fenton process
下载免费PDF全文
![点击此处可从《环境质量管理》网站下载免费的PDF全文](/ch/ext_images/free.gif)
Lucas Pisoni da Silva Silvio Roberto Taffarel Fernanda Rosa da Silveira Fagner Tafarel Campos de Sá Luís Felipe Silva Oliveira 《环境质量管理》2018,27(4):135-141
This work examines the possibility and the potential application of physicochemical processes (coagulation and flocculation) and advanced oxidative processes (Fenton Process) in the treatment of effluents from the re‐refining of used lubricating oils. 相似文献
994.
Anna Donnla O'Hagan Johann Issartel Richard Fletcher Giles Warrington 《International journal of occupational safety and ergonomics》2016,22(2):165-172
Introduction. Working long duty hours has often been associated with increased risk of incidents and accidents in transport industries. Despite this, information regarding the intermediate relationship between duty hours and incident risk is limited. This study aimed to test a work hours/incident model to identify the interplay of factors contributing to incidents within the aviation industry. Methods. Nine hundred and fifty-four European-registered commercial airline pilots completed a 30-item survey investigating self-report attitudes and experiences of fatigue. Path analysis was used to test the proposed model. Results. The fit indices indicated this to be a good fit model (χ2?=?11.066, df?=?5, p?=?0.05; Comparative Fit Index?=?0.991; Normed Fit Index?=?0.984; Tucker–Lewis Index?=?0.962; Root Mean Square of Approximation?=?0.036). Highly significant relationships were identified between duty hours and sleep disturbance (r?=?0.18, p?0.001), sleep disturbance and fatigue in the cockpit (r?=?0.40, p?0.001), and fatigue in the cockpit and microsleeps in the cockpit (r?=?0.43, p?0.001). Discussion. A critical pathway from duty hours through to self-reported incidents in flight was identified. Further investigation employing both objective and subjective measures of sleep and fatigue is needed. 相似文献
995.
Environmental contamination from electronic waste recycling at Guiyu, southeast China 总被引:4,自引:0,他引:4
Anna Leung Zong Wei Cai Ming Hung Wong 《Journal of Material Cycles and Waste Management》2006,8(1):21-33
The disposal, recycling, and part salvaging of discarded electronic devices such as computers, printers, televisions, and
toys are now creating a new set of waste problems. This study is aimed at identifying the sources and quantifying the pollution
levels generated from electronic waste (e-waste) activities at Guiyu, Guangdong Province, China, and their potential impacts
on the environment and human health. The preliminary results indicate that total polycyclic aromatic hydrocarbons (PAHs) in
soil obtained from a printer roller dump site was 593 μg/kg dry weight (dry wt.) and in sediment from a duck pond, the PAH
concentration was 514 μg/kg (dry wt.). Sediment from the Lianjiang River was found to be contaminated by polychlorinated biphenyls
(743 μg/kg) at a level approaching three times the Canadian Environmental Quality Guidelines probable effect level of 277 μg/kg.
Total mono- to hepta-brominated diphenyl ether homologue concentrations (1140 and 1169 μg/kg dry wt.) in soils near dumping
sites were approximately 10–60 times those reported for other polybrominated diphenyl ether-contaminated locations in the
world. In-house study on the open burning of cable wires showed extremely high levels of polychlorinated dibenzo-p-dioxins and dibenzofurans resulting in 12419 ng toxic equivalents (TEQ)/kg of waste input and 15 610 ng TEQ/kg for two separate
tests, respectively, which were about three orders of magnitude higher than those for the open burning of household waste.
High levels of Cu (712, 528, and 496 mg/kg), exceeding the new Dutch list action value, were determined for soil near the
printer roller dumping area, sediment from Lianjiang River, and soil from a plastic burn site, respectively. A more thorough
study is underway to elucidate the extent of contamination of toxic pollutants in different ecological compartments to establish
whether these pollutants are bioaccumulated and biomagnified through food chains. Assessments of human health impacts from
oral intake, inhalation, and dermal contact will be subsequently investigated.
An erratum to this article is available at. 相似文献
996.
Kris Wernstedt Peter B. Meyer Anna Alberini Lauren Heberle 《Journal of Environmental Planning and Management》2006,49(1):101-119
Public agencies in the US have committed resources to encourage private investment in reusing contaminated sites. With public funds in short supply, the effectiveness of their efforts matters both to the agencies and the development community. This paper draws on a mail survey of private developers that uses conjoint choice experiments to investigate the relative attractiveness of incentives to promote residential infill on contaminated property. Results suggest protection from third party liability offers the most value, with protection from cleanup liability and relief from public hearing requirements also important. The findings indicate several opportunities for planners to promote infill on contaminated sites in a socially and environmentally appropriate manner. 相似文献
997.
998.
Thomas H Christensen Gurbakhash Bhander Hanna Lindvall Anna W Larsen Thilde Fruergaard Anders Damgaard Simone Manfredi Alessio Boldrin Christian Riber Michael Hauschild 《Waste management & research》2007,25(3):257-262
Life-cycle assessment (LCA) models are becoming the principal decision support tools of waste management systems. This paper describes our experience with the use of EASEWASTE (Environmental Assessment of Solid Waste Systems and Technologies), a new computerized LCA-based model for integrated waste management. Our findings provide a quantitative understanding of waste management systems and may reveal consistent approaches to improve their environmental performances. EASEWASTE provides a versatile system modelling facility combined with a complete life-cycle impact assessment and in addition to the traditional impact categories addresses toxicity-related categories. New categories dealing with stored ecotoxicity and spoiled groundwater resources have been introduced. EASEWASTE has been applied in several studies, including full-scale assessments of waste management in Danish municipalities. These studies led to numerous modelling issues: the need of combining process-specific and input-specific emissions, the choice of a meaningful time horizon, the way of accounting for biological carbon emissions, the problem of stored ecotoxicity and aspects of crediting the waste management system with the savings inherent in avoided production of energy and materials. Interpretation of results showed that waste management systems can be designed in an environmentally sustainable manner where energy recovery processes lead to substantial avoidance of emissions and savings of resources. 相似文献
999.
Anna Kaczmarska Anna ?uczak 《International journal of occupational safety and ergonomics》2007,13(2):117-125
This article presents the results of an analysis of annoyance caused by low-frequency noise (including infrasonic noise) that occurs at work stations located in offices. The tests covered measurements of acoustic parameters specific for this type of noise and a survey conducted in the working environment and in laboratory conditions at a model of a work station. 相似文献
1000.
Ivan B. T. Lima Fernando M. Ramos Luis A. W. Bambace Reinaldo R. Rosa 《Mitigation and Adaptation Strategies for Global Change》2008,13(2):193-206
By means of a theoretical model, bootstrap resampling and data provided by the International Commission On Large Dams (ICOLD
(2003) World register of dams. http://www.icold-cigb.org) we found that global large dams might annually release about 104 ± 7.2 Tg
CH4 to the atmosphere through reservoir surfaces, turbines and spillways. Engineering technologies can be implemented to avoid
these emissions, and to recover the non-emitted CH4 for power generation. The immediate benefit of recovering non-emitted CH4 from large dams for renewable energy production is the mitigation of anthropogenic impacts like the construction of new large
dams, the actual CH4 emissions from large dams, and the use of unsustainable fossil fuels and natural gas reserves. Under the Clean Development
Mechanism of the Kyoto Protocol, such technologies can be recognized as promising alternatives for human adaptations to climate
change concerning sustainable power generation, particularly in developing nations owning a considerable number of large dams.
In view of novel technologies to extract CH4 from large dams, we estimate that roughly 23 ± 2.6, 2.6 ± 0.2 and 32 ± 5.1 Tg CH4 could be used as an environmentally sound option for power generation in Brazil, China and India, respectively. For the whole
world this number may increase to around 100 ± 6.9 Tg CH4. 相似文献