全文获取类型
收费全文 | 37631篇 |
免费 | 473篇 |
国内免费 | 549篇 |
专业分类
安全科学 | 1113篇 |
废物处理 | 1581篇 |
环保管理 | 5067篇 |
综合类 | 6913篇 |
基础理论 | 9515篇 |
环境理论 | 15篇 |
污染及防治 | 9688篇 |
评价与监测 | 2287篇 |
社会与环境 | 2268篇 |
灾害及防治 | 206篇 |
出版年
2022年 | 349篇 |
2021年 | 322篇 |
2020年 | 283篇 |
2019年 | 286篇 |
2018年 | 548篇 |
2017年 | 526篇 |
2016年 | 820篇 |
2015年 | 638篇 |
2014年 | 901篇 |
2013年 | 2839篇 |
2012年 | 1169篇 |
2011年 | 1684篇 |
2010年 | 1305篇 |
2009年 | 1463篇 |
2008年 | 1672篇 |
2007年 | 1731篇 |
2006年 | 1484篇 |
2005年 | 1253篇 |
2004年 | 1245篇 |
2003年 | 1234篇 |
2002年 | 1152篇 |
2001年 | 1482篇 |
2000年 | 1045篇 |
1999年 | 682篇 |
1998年 | 451篇 |
1997年 | 505篇 |
1996年 | 511篇 |
1995年 | 577篇 |
1994年 | 500篇 |
1993年 | 460篇 |
1992年 | 435篇 |
1991年 | 449篇 |
1990年 | 436篇 |
1989年 | 416篇 |
1988年 | 369篇 |
1987年 | 337篇 |
1986年 | 322篇 |
1985年 | 340篇 |
1984年 | 399篇 |
1983年 | 349篇 |
1982年 | 379篇 |
1981年 | 338篇 |
1980年 | 275篇 |
1979年 | 306篇 |
1978年 | 241篇 |
1977年 | 238篇 |
1976年 | 205篇 |
1975年 | 221篇 |
1974年 | 235篇 |
1972年 | 204篇 |
排序方式: 共有10000条查询结果,搜索用时 140 毫秒
861.
862.
863.
864.
William Lin Robert L Spore Edmund A Nephew 《Journal of Environmental Economics and Management》1976,3(3):236-252
This study quantifies the short-run impacts of reclamation on strip mining costs, coal prices, production, and employment in Appalachia. A process analysis model is developed and used to estimate short-run strip-mined coal supply functions under conditions of alternative reclamation requirements. Then, an econometric model is developed and used to estimate coal demand relations. Our results show that full reclamation has rather minor impacts. In 1972, full reclamation would have increased strip-mined coal production costs an average of $0.35 per ton, reduced strip-mined coal production by 10 million tons, and cost approximately 1600 jobs in Appalachia. 相似文献
865.
866.
867.
Sadika M. Baladi Catherine M. Lewis Amitava Ganguly Alvin G. Morrow Lisel R. Shoffner Robert F. Blundy Patrick F. Nakagawa Sara T. Mundy Larry Anderson Karen Adams 《补救:环境净化治理成本、技术与工艺杂志》2003,14(1):5-20
Enhanced bioremediation is quickly developing into an economical and viable technology for the remediation of contaminated soils. Until recently, chlorinated organic compounds have proven difficult to bioremediate. Environmentally recalcitrant compounds, such as polychlorinated biphenyls (PCBs) and persistent organic pesticides (POPs) such as dichlorodiphenyl trichloroethane (DDT) have shown to be especially arduous to bioremediate. Recent advances in field‐scale bioremedial applications have indicated that biodegradation of these compounds may be possible. Engineers and scientists at the Savannah River Site (SRS), a major DOE installation near Aiken, South Carolina, are using enhanced bioremediation to remediate soils contaminated with pesticides (DDT and its metabolites, heptachlor epoxide, dieldrin, and endrin) and PCBs. This article reviews the ongoing remediation occurring at the Chemicals, Metals, and Pesticides (CMP) Pits using windrow turners to facilitate microbial degradation of certain pesticides and PCBs. © 2003 Wiley Periodicals, Inc. 相似文献
868.
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
869.
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
870.
In the UK for the period 1994-99, a broad range of environmental projects were given financial support through the European Agriculture Guidance and Guarantee Fund under the Objective 1 and Objective 5b programmes. This paper is concerned with the ex-post evaluation of these projects set within a Sustainable Development framework. The aim was to identify project types or characteristics that offered the greatest return on investment. A classification of six broad project types was adopted. The evaluation revealed that there were significant differences between individual projects with respect to the type and scale, and temporal and social distribution of the benefits they delivered. In particular, as well as delivering environmental and economic benefits, many projects made a significant contribution to the development of human and social capital. The paper concludes that it is possible to improve the basis for future project selection in order to maximise the returns on environmental investments in the context of sustainable development. 相似文献