全文获取类型
收费全文 | 3778篇 |
免费 | 281篇 |
国内免费 | 706篇 |
专业分类
安全科学 | 295篇 |
废物处理 | 50篇 |
环保管理 | 781篇 |
综合类 | 1986篇 |
基础理论 | 567篇 |
环境理论 | 4篇 |
污染及防治 | 118篇 |
评价与监测 | 180篇 |
社会与环境 | 557篇 |
灾害及防治 | 227篇 |
出版年
2024年 | 26篇 |
2023年 | 60篇 |
2022年 | 134篇 |
2021年 | 152篇 |
2020年 | 123篇 |
2019年 | 128篇 |
2018年 | 148篇 |
2017年 | 180篇 |
2016年 | 193篇 |
2015年 | 193篇 |
2014年 | 164篇 |
2013年 | 249篇 |
2012年 | 256篇 |
2011年 | 284篇 |
2010年 | 250篇 |
2009年 | 215篇 |
2008年 | 193篇 |
2007年 | 226篇 |
2006年 | 268篇 |
2005年 | 189篇 |
2004年 | 147篇 |
2003年 | 167篇 |
2002年 | 147篇 |
2001年 | 109篇 |
2000年 | 98篇 |
1999年 | 62篇 |
1998年 | 59篇 |
1997年 | 51篇 |
1996年 | 58篇 |
1995年 | 30篇 |
1994年 | 31篇 |
1993年 | 28篇 |
1992年 | 13篇 |
1991年 | 15篇 |
1990年 | 16篇 |
1989年 | 5篇 |
1988年 | 10篇 |
1987年 | 10篇 |
1986年 | 6篇 |
1983年 | 3篇 |
1982年 | 8篇 |
1981年 | 5篇 |
1980年 | 12篇 |
1979年 | 4篇 |
1978年 | 6篇 |
1977年 | 8篇 |
1975年 | 6篇 |
1973年 | 6篇 |
1972年 | 3篇 |
1971年 | 5篇 |
排序方式: 共有4765条查询结果,搜索用时 234 毫秒
671.
Advocates for environmental justice: the role of the champion in public participation implementation
Deborah Rigling Gallagher 《Local Environment》2013,18(10):905-916
That segment of the community I would say is just in general pretty disenfranchised. We found that if you want participation you have to go to them. I mean there are days when you just need to go knock on the door. Brownfields developer in a poor urban neighbourhood
This article considers the role that champions play as advocates for socioeconomically disadvantaged community member involvement in environmental management decision-making. Six case studies of brownfields redevelopment projects located in poor urban neighbourhoods are examined. Analysis of these case studies reveals how champion behaviour, which has typically been studied only in the context of technological innovation, is enacted in public participation efforts in the service of environmental justice. The study finds that champions who emerge in these settings lead the development and implementation of non-standard public participation process innovations. 相似文献
672.
David Dodman 《Local Environment》2013,18(7):571-587
Caribbean urban waterfronts have been extensively modified in recent decades to encourage business (especially through the development of new commercial districts) and tourism (particularly in the form of cruise shipping). This paper draws on three case studies from Jamaica to explore the processes through which waterfronts have been redeveloped and the ways in which these spaces are used. The transformation and ongoing management of these waterfronts involve the negotiation of a complex set of power relationships between stakeholders operating at a variety of scales, including national governments, the private sector, Jamaican citizens and tourists. The position of waterfronts at the junction of the “urban” and the “natural” environments provides a fruitful nexus for examining the intricacies of society–nature relationships, and illustrates the ways in which ideas of modernity, development, identity and exclusion are incorporated into the local environment. 相似文献
673.
Derek Antrobus 《Local Environment》2013,18(4):295-308
Creative cities are generally considered as “cool” spaces which attract a particular “creative class” whose ability to innovate and transform – particularly in the media and cultural sectors – offers urban economies a competitive edge. This paper argues that, in the face of dangerous climate change, the creativity of the “not-so-cool” sectors needs to be acknowledged and valued. A case study of Salford in the north-west of England shows how political, technological and economic creativity has secured sustainable regeneration within a floodplain. It is argued that the concept of “creativity” in urban economic discourse needs to be widened to acknowledge the importance of the creativity of planners, civil engineers and builders in securing environmentally sustainable cities. Environmental sustainability, it suggests, not only underpins economic sustainability. Faced with dangerous climate change and society's need to respond, the skills and expertise can in themselves contribute to a city's competitiveness. 相似文献
674.
This paper reports on the results of a study of the relationship between the nonprofit sector and the pursuit of sustainability in 13 moderate sized US cities with populations between 400,000 and 600,000. Dividing the cities into two groups – those that have been more serious and less serious about adopting and implementing sustainability policies, analysis of a survey of local public officials examines differences in the nonprofit landscape. Analysis shows that the cities that are more serious about sustainability have local public officials who interact more with nonprofit organisations, and are more likely to report the presence of at least one nonprofit group that supports city sustainability policies. Additionally, these reported groups are more likely to be “local”, or homegrown, and to be explicitly dedicated to the environment or sustainability. While far from definitive, the results provide evidence that the nonprofit sector is different in cities with sustainability policies, and suggest that the role of these nonprofit groups in the governance decisions of city leaders warrants more in-depth study. 相似文献
675.
Christine Wallgren 《Local Environment》2013,18(2):233-251
Abstract This study compares energy use for food transport to a farmers' market in Sweden with energy use for transport in the conventional food system. The farmers' market was investigated through data sampling from on-site investigations. The conventional food system was studied with the aid of life cycle assessments reported in the literature. Overall, the study found no significant differences in levels of energy use for transport to the farmers' market compared with the conventional food system. For certain products, such as fresh fruits and vegetables, transport-related energy use was much lower in the local system although the season in Sweden for this kind of product is restricted to two or three months at the end of the summer. However, there is considerable potential to increase energy efficiency in local food systems by organizing the selling in new ways and by using more energy efficient vehicles. 相似文献
676.
Abstract The forests of Nepal, which in the past were at least nominally under the direct control of the state, are today increasingly entrusted to local people in the name of community forestry (CF). CF is considered a successful endeavour in managing forest resources, conserving biodiversity and supplying people with basic economic needs. In order to assess to what extent the two goals of biodiversity conservation and meeting economic needs of people have been integrated through CF, four community forestry user groups (CFUGs) were studied in the Mid-hills ecological zone. Based on a participatory survey and a critical review of the statutes and operational plans of these CFUGs, it was found that integration of biodiversity conservation was still insufficient, and that improvements in the policy and management regimes of CF are necessary to achieve a balance between biodiversity conservation and economic use of the forest resources. 相似文献
677.
介绍了我国企业近年来在海外地区的发展态势,简要说明了在海外高风险地区项目面临的安全威胁和挑战,分析了海外高风险地区项目可能发生突发事件的种类和危害,阐述了海外项目应对突发事件的策略,在此基础上建立了海外高风险地区项目应对突发事件的通用应急管理模式,并通过相关实例进行了说明,总结了海外高风险地区项目应对突发事件的关键环节和经验. 相似文献
678.
为准确评价城轨信号系统安全保障能力及影响因素,基于云理论对定性与定量因素的良好融合优点,构建城轨信号系统安全保障能力评价云模型及评价指标体系,采用组合赋权法对各指标赋予权重,并基于专家意见,利用正向云发生器生成标准云。结果表明:该云模型具有一定稳定性和可靠性,可对城轨信号系统安全保障能力进行有效测评,同时能够发现安全运营中的缺陷,有助于协助管理方进行针对性改善,以提高城轨信号系统的安全保障能力。 相似文献
679.
以广东省佛山市甲、乙两间污水处理厂为例,从工艺特征、工艺参数、水质特点、存在问题及相应措施几个方面介绍了两种改良型A2/O工艺在不同进水条件下的运行情况。 相似文献
680.
在浙江省造纸行业比较集中的富阳市,将一批生产白板纸的同类型企业作为一个区域整体,开展清洁生产审核工作。将富阳市8家造纸企业作为区域清洁生产审核模式的示范试点,并进行了初步研究。研究结果认为,区域性的清洁生产审核模式适用于所有行业,具有很强的推广性。 相似文献