全文获取类型
收费全文 | 424篇 |
免费 | 13篇 |
国内免费 | 26篇 |
专业分类
安全科学 | 35篇 |
废物处理 | 2篇 |
环保管理 | 145篇 |
综合类 | 151篇 |
基础理论 | 44篇 |
污染及防治 | 25篇 |
评价与监测 | 23篇 |
社会与环境 | 22篇 |
灾害及防治 | 16篇 |
出版年
2023年 | 5篇 |
2022年 | 3篇 |
2021年 | 16篇 |
2020年 | 20篇 |
2019年 | 7篇 |
2018年 | 12篇 |
2017年 | 13篇 |
2016年 | 16篇 |
2015年 | 17篇 |
2014年 | 17篇 |
2013年 | 28篇 |
2012年 | 18篇 |
2011年 | 19篇 |
2010年 | 23篇 |
2009年 | 19篇 |
2008年 | 22篇 |
2007年 | 16篇 |
2006年 | 16篇 |
2005年 | 15篇 |
2004年 | 9篇 |
2003年 | 15篇 |
2002年 | 12篇 |
2001年 | 14篇 |
2000年 | 16篇 |
1999年 | 12篇 |
1998年 | 10篇 |
1997年 | 9篇 |
1996年 | 4篇 |
1995年 | 7篇 |
1994年 | 4篇 |
1993年 | 3篇 |
1992年 | 3篇 |
1990年 | 2篇 |
1989年 | 4篇 |
1988年 | 4篇 |
1986年 | 5篇 |
1985年 | 5篇 |
1984年 | 1篇 |
1983年 | 1篇 |
1982年 | 1篇 |
1981年 | 2篇 |
1980年 | 3篇 |
1979年 | 4篇 |
1978年 | 1篇 |
1977年 | 1篇 |
1976年 | 1篇 |
1975年 | 1篇 |
1974年 | 2篇 |
1973年 | 1篇 |
1971年 | 1篇 |
排序方式: 共有463条查询结果,搜索用时 156 毫秒
281.
282.
Elaine van Tol Smit Ryan Plummer 《Journal of Environmental Planning and Management》2015,58(3):423-444
Collaboration is an increasingly important approach to dealing with complex environmental challenges. Participation of diverse actors in collaborative processes necessitates attention to the use of different forms of knowledge. We use a multi-case study of governance for water in New Brunswick, Canada, to explore knowledge-related concerns that are prominent in collaborative processes. As is common in other contexts, local or lay (experiential) forms of knowledge appeared to play complementary but ultimately subordinate roles to expert technical and scientific knowledge in the cases. Importantly, we found that the distinction between ‘expert’ and ‘local’ knowledge was not at all clear for the many participants. This study reinforces the importance of designing reflexive and flexible processes for encouraging the active engagement and use of knowledge in collaboration. 相似文献
283.
The Ethics and Politics of Animal Welfare
in New Zealand: Broiler Chicken Production as a Case Study
Michael C. Morris 《Journal of Agricultural and Environmental Ethics》2009,22(1):15-30
The cause of poor welfare in broilers is multifactorial, but genotype is a major contributor. Modern broilers have been bred
for rapid growth, and this leads to increases in lameness and ascites as the legs and hearts of the heavier birds find it
difficult to cope with the extra demands placed on them. Visible lameness indicative of pain is more common in New Zealand
than in Europe. The government, however, insists that New Zealand welfare standards are higher than Europe. The government
also appears to have a strong antipathy to those demanding better welfare for broilers. Reasons for this antipathy and disparities
between government statements and research results are discussed. Government publications reveal that animal welfare is seen
as a question of image for market access and that there is little concern with animal welfare as an ethical imperative for
its own sake. The Animal Welfare Act in theory makes it an offence to ill treat an animal, but in practice allows exemptions
for industrial agriculture. The interests of animals may be better protected by an independent animal welfare advisory service. 相似文献
284.
Primary steelmaking involves CO2-intensive processes, but the expansion of secondary steel production is limited by the global availability of steel scrap. The present work examines global scrap consumption in the past (1870–2012) and future scrap availability (2013–2050) based on the historical trend. The results reveal that (i) historically, the consumption of old scrap has been insufficient compared with the amounts of discarded steel, and (ii) based on historical scrap consumption, the future availability of scrap will not be sufficient to satisfy the two assumed cases of steel demand. Primary steelmaking is expected to remain the dominant process, at least up until 2050. Under the reference-demand case of 2.19 billion tons in crude steel production by 2050, the total production of pig iron and direct reduced iron could reach 1.35 billion tons. Consumption of old scrap could reach 0.76 billion tons. Because the availability of scrap will be limited in the context of the global total, it is important to research and develop innovative low-carbon technologies for primary steelmaking and to explore their economic viability if we are to aim for achieving large reductions in CO2 emissions from the iron and steel industry. 相似文献
285.
NICK T. SHEARS§ FRANZ SMITH† RUSS C. BABCOCK†† CLINTON A.J. DUFFY‡ EDUARDO VILLOUTA‡ 《Conservation biology》2008,22(2):467-481
Abstract: For many regions worldwide, multiple and often contrasting biogeographic classifications exist that are derived from a variety of taxa and techniques. This presents a challenge for managers who must choose appropriate large-scale spatial frameworks for systematic conservation planning. We demonstrate how systematically collected community data can be used to evaluate existing biogeographic classifications, identify the most appropriate metric for biogeographic patterns seen in other taxonomic groups, and develop an independent biogeographic classification scheme for systematic conservation planning. We evaluated 6 existing biogeographic classifications for New Zealand's nearshore marine environment with community-similarity metrics derived from abundance and presence–absence data for macroalgae (107 species) and mobile macroinvertebrates (44 species). The concordance between community metrics and the previous classifications was high, as indicated by a high multivariate classification success (CS) (74.3–98.3%). Subsequently, we carried out an independent classification analysis on each community metric to identify biogeographic units within a hierarchical spatial framework. The classification derived from macroalgal presence–absence data achieved the highest CS and could be used as a mesoscale classification scheme in which 11 regional groupings (i.e., bioregions) (CS = 73.8–84.8%) are nested within northern and southern biogeographic provinces (CS = 90.3–98.7%). These techniques can be used in systematic conservation planning to inform the design of representative and comprehensive networks of marine protected areas through evaluation of the current coverage of marine reserves in each bioregion. Currently, 0.22% of the territorial sea around mainland New Zealand is protected in no-take marine protected areas in which 0–1.5% of each bioregion represented. 相似文献
286.
Anthony Ramsay MA FRTPI DipTE MICE MIHT 《Journal of Environmental Planning and Management》1989,32(2):87-94
The development corporations of the new towns in Scotland have had to overcome many obstacles in the execution of their task. This history is outlined for each new town in the appendices. The statutory and political context of the imminent winding‐up of the development corporations of the remaining five new towns is explained, and the preliminary steps by the Scottish Office in recent years are outlined. The Government's strategy for transfer of responsibilities from the development corporations to other bodies is summarised and discussed under four broad headings. Finally, the prospects for more new settlements in Scotland are assessed. 相似文献
287.
Robert J. Davies‐Colley David G. Smith Robert C. Ward Graham G. Bryers Graham B. McBride John M. Quinn Mike R. Scarsbrook 《Journal of the American Water Resources Association》2011,47(4):750-771
Davies‐Colley, Robert J., David G. Smith, Robert C. Ward, Graham G. Bryers, Graham B. McBride, John M. Quinn, and Mike R. Scarsbrook, 2011. Twenty Years of New Zealand’s National Rivers Water Quality Network: Benefits of Careful Design and Consistent Operation. Journal of the American Water Resources Association (JAWRA) 47(4):750‐771. DOI: 10.1111/j.1752‐1688.2011.00554.x Abstract: This paper reviews New Zealand’s National Rivers Water Quality Network (NRWQN), which is now in its third decade of monitoring. The NRWQN is noteworthy for being operationally stable throughout its history, and the resulting consistency is increasingly valuable for detecting water quality trends and for “anchoring” temporary special purpose monitoring campaigns. The NRWQN was carefully designed following considerable effort to learn from monitoring experiences elsewhere. Monthly visits are made to 77 sites (all near hydrometric stations) on 35 river systems that cumulatively drain about one half of the national landscape. “Core” (routinely measured) variables are: conductivity, pH, temperature, dissolved oxygen, visual clarity, turbidity, colored dissolved organic matter, fecal indicator bacteria, and different forms of nitrogen and phosphorus (italics indicate field measurements). Associated benthic biological monitoring comprises monthly visual assessment of periphyton and annual sampling for macro‐invertebrates. We overview the conception, design, initiation, and operational history of the NRWQN, and highlight the diverse applications of its datasets including numerous scientific applications, national‐scale modeling of material fluxes, and state‐of‐environment reporting and practical water management at both regional and national scale. The qualified success of the NRWQN can probably be attributed to careful (and parsimonious) design and consistent operation. 相似文献
288.
Sullivent EE West CA Noe RS Thomas KE Wallace LJ Leeb RT 《Journal of Safety Research》2006,37(2):213-217
The Journal of Safety Research has partnered with the National Center for Injury Prevention and Control at the Centers for Disease Control and Prevention (CDC) in Atlanta, Georgia, USA, to briefly report on some of the latest findings in the research community. This report is the fourth edition in a series of CDC articles. BACKGROUND: An active injury and illness surveillance system was established by the Centers for Disease Control and Prevention (CDC) along with the Louisiana Department of Health and Hospitals (LDHH) in the aftermath of Hurricane Katrina in functioning hospitals and medical clinics. RESULTS: The surveillance system recorded 7,543 nonfatal injuries among residents and relief workers between September 8-October 14, 2005. The leading mechanisms of injury identified in both groups were fall and cut/stab/pierce, with a greater proportion of residents compared to relief workers injured during the repopulation period. Clean-up was the most common activity at the time of injury for both groups. CONCLUSION: Injuries documented through this system underscore the need for surveillance of exposed populations to determine the injury burden and initiate injury prevention activities and health communication campaigns. 相似文献
289.
Lei Zhang 《中国人口.资源与环境(英文版)》2013,11(3):242-251
ABSTRACTThe evolution of Chinese environmental policy and politics can be better understood in the broader context of institutional changes that have taken place since the late 1970s. In this study, an analytical framework was established to analyze how overall institutional changes were reflected in the roles of relationships between governmental and non-governmental actors engaged in environmental governance. Institutional changes were observed at three levels: informal institutions (cultural traditions, and political ideology); formal institutions (the polity, political system, property rights, and judiciary); and governing mechanisms (structures, regulatory approaches, and incentives). This analysis of interactions between institutional changes and the changing environmental process explained not only the drives and constraints behind China’s environmental policy evolution so far but also shed light on future challenges and opportunities. 相似文献
290.
《Environmental Communication: A Journal of Nature and Culture》2013,7(3):274-280
Canoes forging through cold waters, mountains rising from the sea, a heart beating under a mountain lake, an albatross sailing toward the Antarctic: these were the story-images of Coastal Mappings, a large-scale community project set in and around Dunedin, New Zealand. In the Coastal Mappings performance project, people in the last months of their lives joined cancer survivors, family members and other interested people in explorations of Pakeha myths (by European-settler descendents) and Maori myths (by descendents of the crews of the first canoes, first inhabitants of New Zealand). Together, we created personal landscapes through movement, storytelling, photography and video. In this essay, I discuss some of the opportunities, challenges and experiences of leading a community dance project in an intercultural social environment, and with people whose relationship to their environment is different from mine. 相似文献