全文获取类型
收费全文 | 15615篇 |
免费 | 199篇 |
国内免费 | 138篇 |
专业分类
安全科学 | 568篇 |
废物处理 | 588篇 |
环保管理 | 2413篇 |
综合类 | 2552篇 |
基础理论 | 4036篇 |
环境理论 | 10篇 |
污染及防治 | 3860篇 |
评价与监测 | 1027篇 |
社会与环境 | 775篇 |
灾害及防治 | 123篇 |
出版年
2023年 | 92篇 |
2022年 | 139篇 |
2021年 | 137篇 |
2020年 | 135篇 |
2019年 | 155篇 |
2018年 | 239篇 |
2017年 | 258篇 |
2016年 | 350篇 |
2015年 | 296篇 |
2014年 | 392篇 |
2013年 | 1211篇 |
2012年 | 530篇 |
2011年 | 710篇 |
2010年 | 574篇 |
2009年 | 664篇 |
2008年 | 716篇 |
2007年 | 723篇 |
2006年 | 641篇 |
2005年 | 586篇 |
2004年 | 497篇 |
2003年 | 491篇 |
2002年 | 479篇 |
2001年 | 564篇 |
2000年 | 411篇 |
1999年 | 268篇 |
1998年 | 176篇 |
1997年 | 217篇 |
1996年 | 210篇 |
1995年 | 241篇 |
1994年 | 245篇 |
1993年 | 201篇 |
1992年 | 169篇 |
1991年 | 199篇 |
1990年 | 189篇 |
1989年 | 181篇 |
1988年 | 138篇 |
1987年 | 129篇 |
1986年 | 133篇 |
1985年 | 113篇 |
1984年 | 124篇 |
1983年 | 136篇 |
1982年 | 135篇 |
1981年 | 137篇 |
1980年 | 113篇 |
1979年 | 127篇 |
1978年 | 86篇 |
1977年 | 81篇 |
1975年 | 80篇 |
1973年 | 74篇 |
1972年 | 69篇 |
排序方式: 共有10000条查询结果,搜索用时 13 毫秒
51.
52.
53.
This article examines the role of economic development agencies in strengthening the environmental performance of industry within rapidly industrialising East Asian economies. Three case-study examples are considered, namely, the role of the Industrial Development Board in reducing industrial pollution in Taiwan, pollution control in the palm oil industry in Malaysia, and the role of the Economic Development Board in influencing environmental performance of industry in Singapore. The concept of embedded autonomy is developed to consider the ways in which agencies of economic development can work with firms and industries while simultaneously remaining autonomous from these firms with respect to setting and enforcing performance standards. The three cases suggest that a form of policy integration that more directly integrates economic and environmental goals within agencies of economic development may be feasible, but only where there exists a strong autonomous government bureaucracy and where there is strong societal commitment to improving the environmental performance of industry. 相似文献
54.
There is a growing recognition that knowledge of indigenous communities, based on accumulated observations and experience over time, is significant for sustainable environmental management in collaboration with modern scientific knowledge. A number of innovative policy initiatives are currently being implemented in New Zealand to enable indigenous Maori tribes and sub-tribes to rehabilitate and manage their local fisheries in accordance with customary values and practices. These policies are an important milestone from an historical perspective as they are meant to recognise and empower the role of Maori as Treaty partners. The fisheries management regime in New Zealand now provides for Maori representation at the local level within a co-management framework that enables local Maori communities to exercise their customary rights. These institutional arrangements have been crafted to facilitate Maori input, based on customary values and practices, to complement modern Western management practices for sustainable harvesting of marine resources. Nevertheless, the degree to which these initiatives constitute an adequate response to Maori Treaty aspirations is debatable. A major constraint in this respect is that the government is compelled to recognise the needs of other, economically and politically more dominant, non-Maori user-groups in allocating and managing access to fishery resources and the marine environment. 相似文献
55.
Michael Cuthill 《Local Environment》2003,8(4):471-485
Max-Neef's theory of human-scale development (HSD) directs attention to an issues-based, locality specific agenda through self-identification of community issues by local people. This paper reports on a two-day HSD workshop run on the Gold Coast where an eclectic group of 20 participants worked through Max-Neef's framework to diagnose their communities' current reality, visualise what their community could be and discuss how to 'build bridges' between the current reality and their Utopian community. This work is part of a broader research programme looking at participatory community development. 相似文献
56.
B. Rollin 《Journal of Agricultural and Environmental Ethics》1997,10(1):25-40
The creation of a cloned sheep from mammary tissue has raisedmajor social concern, and much talk about major ethical issuesoccasioned by this technology. It is necessary to separategenuine from spurious ethical issues here, a task made failureto initiate ethical discussion and explanation of new technologyas well as by fear reactions in society. As in geneticengineering of animals, issues about cloning fall into threecategories – suggestions that the technology is inherently wrong,risk emerging from the technology and harm to the creatureengendered. The issues regarding the cloning of humans can beanalyzed using the same categories. 相似文献
57.
Robert B. Olshansky 《Environmental management》1996,20(1):11-23
The California Environmental Quality Act (CEQA) has evolved from a mini-NEPA, first enacted in 1970, into a procedural act
that affects the approval process of all large developments in California. In 1990, California local governments produced
over 1600 environmental impact reports and 30,000 initial studies under CEQA. Because of its widespread use, CEQA has periodically
drawn the attention of the state legislature, most recently in 1993, when over 60 CEQA reform bills were introduced. This
paper describes the CEQA process and evaluates its success at meeting its explicit and implicit goals. The research includes
a statewide survey of CEQA practice, sent to the planning departments of all 513 local governments in California in 1991.
Survey respondents agreed that CEQA helps in evaluating environmental impacts, reducing impacts, informing the public, and
coordinating public agency review. It is effective in reducing the environmental impacts of individual projects, but is not
as effective in improving environmental quality on an areawide scale. This research concludes that CEQA has led to positive
outcomes and is not as deeply flawed as many of its critics claim. Still, CEQA as currently designed may not be the optimal
vehicle for ensuring environmental quality. 相似文献
58.
Corporations own approximately 25% of all private land in the United States and, therefore, play an essential role in protecting biodiversity and maintaining natural habitats. The Wildlife Habitat Council (WHC) is a unique joint venture between conservation organizations and corporations to utilize corporate lands for ensuring biodiversity. The following case studies demonstrate how corporations have helped ensure healthy ecosystems and provided critical leadership in regional efforts. Amoco Chemical Company's Cooper River Plant has been instrumental in developing a cooperative project that involves numerous corporations, plantation owners, private citizens, nonprofit organizations, government agencies, and community groups to develop a comprehensive, ecosystem-based management plan for part of the Cooper River in Charleston, South Carolina, USA. The second case focuses on the Morie Company, a national sand quarry operator headquartered in southern New Jersey, USA. Morie Company is working with WHC, community groups, the Pinelands Commission, and other state regulatory agencies to explore sustainable development opportunities for companies within the Pinelands regulations. The third case takes us to DuPont Company's Asturias, Spain, site. A win—win success story of improved habitat and cost savings is the result of DuPont's concern for the environment, ability to work with a variety of groups, and willingness to consider innovative restoration techniques. The fourth case discusses Consumers Power Company's Campbell Plant in West Olive, Michigan, USA. In addition to implementing projects that contribute to biodiversity, Consumers Power has developed an environmental education field station to teach others about the importance of natural habitats. The final case highlights Baltimore Gas & Electric Company's efforts to maintain habitat for endangered species at their Calvert Cliffs site in Maryland. 相似文献
59.
60.
Jonn A. Foulk Wayne Y. Chao Danny E. Akin Roy B. Dodd Patricia A. Layton 《Journal of Polymers and the Environment》2004,12(3):165-171
Municipal solid wastes generated each year contain potentially useful and recyclable materials for composites. Simultaneously, interest is high for the use of natural fibers, such as flax (Linum usitatissimum L.), in composites thus providing cost and environmental benefits. To investigate the utility of these materials, composites containing flax fibers with recycled high density polyethylene (HDPE) were created and compared with similar products made with wood pulp, glass, and carbon fibers. Flax was either enzyme- or dew-retted to observe composite property differences between diverse levels of enzyme formulations and retting techniques. Coupling agents would strengthen binding between fibers and HDPE but in this study fibers were not modified in anyway to observe mechanical property differences between natural fiber composites. Composites with flax fibers from various retting methods, i.e., dew- vs. enzyme-retting, behaved differently; dew-retted fiber composites resulted in both lower strength and percent elongation. The lowest level of enzyme-retting and the most economical process produces composites that do not appear to differ from the highest level of enzyme-retting. Flax fibers improved the modulus of elasticity over wood pulp and HDPE alone and were less dense than glass or carbon fiber composites. Likely, differences in surface properties of the various flax fibers, while poorly defined and requiring further research, caused various interactions with the resin that influenced composite properties. 相似文献