全文获取类型
收费全文 | 6077篇 |
免费 | 132篇 |
国内免费 | 63篇 |
专业分类
安全科学 | 266篇 |
废物处理 | 211篇 |
环保管理 | 1366篇 |
综合类 | 773篇 |
基础理论 | 1508篇 |
环境理论 | 11篇 |
污染及防治 | 1461篇 |
评价与监测 | 358篇 |
社会与环境 | 252篇 |
灾害及防治 | 66篇 |
出版年
2023年 | 29篇 |
2022年 | 38篇 |
2021年 | 66篇 |
2020年 | 50篇 |
2019年 | 68篇 |
2018年 | 129篇 |
2017年 | 132篇 |
2016年 | 177篇 |
2015年 | 142篇 |
2014年 | 157篇 |
2013年 | 541篇 |
2012年 | 259篇 |
2011年 | 353篇 |
2010年 | 269篇 |
2009年 | 295篇 |
2008年 | 310篇 |
2007年 | 351篇 |
2006年 | 327篇 |
2005年 | 227篇 |
2004年 | 216篇 |
2003年 | 202篇 |
2002年 | 203篇 |
2001年 | 119篇 |
2000年 | 101篇 |
1999年 | 92篇 |
1998年 | 88篇 |
1997年 | 97篇 |
1996年 | 88篇 |
1995年 | 106篇 |
1994年 | 88篇 |
1993年 | 69篇 |
1992年 | 54篇 |
1991年 | 52篇 |
1990年 | 57篇 |
1989年 | 34篇 |
1988年 | 43篇 |
1987年 | 39篇 |
1986年 | 54篇 |
1985年 | 38篇 |
1984年 | 53篇 |
1983年 | 49篇 |
1982年 | 47篇 |
1981年 | 44篇 |
1980年 | 34篇 |
1979年 | 38篇 |
1978年 | 25篇 |
1977年 | 20篇 |
1976年 | 12篇 |
1974年 | 15篇 |
1972年 | 15篇 |
排序方式: 共有6272条查询结果,搜索用时 15 毫秒
141.
Roser Rotchs-Ribalta Sara Ruas Karzan D. Ahmed Michael Gormally James Moran Jane Stout Blnaid White Daire
hUallachin 《Ambio》2021,50(2):346
Concerns over the loss of biodiversity and ecosystem services in farmland have prompted the development of agri-environment policy measures aimed at reducing farming pressure and maintaining semi-natural habitats in farmed landscapes. However, further knowledge is needed to guarantee successful agri-environment measures implementation. The current study assessed the quantity and the quality of semi-natural habitats in farms across a gradient of farming intensities in two contrasting regions in Ireland. Policy protection seemed fundamental for semi-natural habitats preservation. Habitats not protected by agricultural policy relied on extensive farming and are in danger of disappearing if they are intensified or abandoned. Due to the lack of policy incentives for habitat quality, no correlations were found between farming intensity and share of semi-natural habitats with habitat quality. Therefore, extensive farming and retention of habitats alone may not reverse the decline of farmland quality and biodiverisity and, thus, measures incentivising the environmental quality may be more successful.Electronic supplementary materialThe online version of this article (10.1007/s13280-020-01344-6) contains supplementary material, which is available to authorized users. 相似文献
142.
Mougin Christian Campbell Peter G. C. Couderchet Michel Denèfle Patrice Martin-Laurent Fabrice Roland Philippe Slaveykova Vera I. Vincent Tatiana Delaunay Delphine 《Environmental science and pollution research international》2021,28(2):1283-1286
Environmental Science and Pollution Research - The scientific knowledge produced by academic research can be valued in all sectors of human activity, including private sector. The ROVALTAIN... 相似文献
143.
Cadano James Ryand Jose Mariel Lubi Aloysius Gerard Maling Joel Nathaniel Moraga Josiah Samuel Shi Quinn Yale Vegafria Hannah Mae VinceCruz-Abeledo Chona Camille 《Environmental science and pollution research international》2021,28(10):11954-11961
Environmental Science and Pollution Research - Bio-waste materials from aquatic species are alternative sources of chitin and chitosan—high-value natural biodegradable and biocompatible... 相似文献
144.
145.
Pavlova Ekaterina Pashkunova-Martic Irena Schaier Martin Petrova Emilia Gluhcheva Yordanka Dorkov Peter Helbich Thomas H. Keppler Bernhard Koellensperger Gunda Ivanova Juliana 《Environmental science and pollution research international》2021,28(6):6784-6795
Environmental Science and Pollution Research - In this study, we compare the effects of deferiprone (Def) and tetraethylammonium salt of salinomycinic acid (Sal) on lead (Pb)-induced toxicity in... 相似文献
146.
Small-scale on-site treatment of fecal matter: comparison of treatments for resource recovery and sanitization 总被引:1,自引:0,他引:1
Kelova Mariya E. Ali Aasim M. Eich-Greatorex Susanne Dörsch Peter Kallenborn Roland Jenssen Petter D. 《Environmental science and pollution research international》2021,28(45):63945-63964
Environmental Science and Pollution Research - On-site small-scale sanitation is common in rural areas and areas without infrastructure, but the treatment of the collected fecal matter can be... 相似文献
147.
Per-and polyfluoroalkyl substances(PFASs) are ubiquitous in sludge and water from waste water treatment plants, as a result of their incorporation in everyday products and industrial processes. In this study, we measured several classes of persistent PFASs,precursors, transformation intermediates, and newly identified PFASs in influent and effluent sewage water and sludge from three municipal waste water treatment plants in Sweden, sampled in 2015. For sludge, samples from 2012 and 2014 were analyzed as well.Levels of precursors in sludge exceeded those of perfluoroalkyl acids and sulfonic acids(PFCAs and PFSAs), in 2015 the sum of polyfluoroalkyl phosphoric acid esters(PAPs) were 15–20 ng/g dry weight, the sum of fluorotelomer sulfonic acids(FTSAs) was 0.8–1.3 ng/g,and the sum of perfluorooctane sulfonamides and ethanols ranged from non-detected to 3.2 ng/g. Persistent PFSAs and PFCAs were detected at 1.9–3.9 ng/g and 2.4–7.3 ng/g dry weight, respectively. The influence of precursor compounds was further demonstrated by an observed substantial increase for a majority of the persistent PFCAs and PFSAs in water after waste water treatment. Perfluorohexanoic acid(PFHxA), perfluorooctanoic acid(PFOA), perfluorohexane sulfonic acid(PFHxS), and perfluorooctane sulfonic acid(PFOS)had a net mass increase in all WWTPs, with mean values of 83%, 28%, 37% and 58%,respectively. The load of precursors and intermediates in influent water and sludge combined with net mass increase support the hypothesis that degradation of precursor compounds is a significant contributor to PFAS contamination in the environment. 相似文献
148.
149.
Jeremy Martinich James Neumann Lindsay Ludwig Lesley Jantarasami 《Mitigation and Adaptation Strategies for Global Change》2013,18(2):169-185
Climate change and sea level rise (SLR) pose risks to coastal communities around the world, but societal understanding of the distributional and equity implications of SLR impacts and adaptation actions remains limited. Here, we apply a new analytic tool to identify geographic areas in the contiguous United States that may be more likely to experience disproportionate impacts of SLR, and to determine if and where socially vulnerable populations would bear disproportionate costs of adaptation. We use the Social Vulnerability Index (SoVI) to identify socially vulnerable coastal communities, and combine this with output from a SLR coastal property model that evaluates threats of inundation and the economic efficiency of adaptation approaches to respond to those threats. Results show that under the mid-SLR scenario (66.9 cm by 2100), approximately 1,630,000 people are potentially affected by SLR. Of these, 332,000 (~20%) are among the most socially vulnerable. The analysis also finds that areas of higher social vulnerability are much more likely to be abandoned than protected in response to SLR. This finding is particularly true in the Gulf region of the United States, where over 99% of the most socially vulnerable people live in areas unlikely to be protected from inundation, in stark contrast to the least socially vulnerable group, where only 8% live in areas unlikely to be protected. Our results demonstrate the importance of considering the equity and environmental justice implications of SLR in climate change policy analysis and coastal adaptation planning. 相似文献
150.
Yang Guo Tyler Stalbaum James Mann Ho Yeung Srinivasan Chandrasekar 《Journal of Manufacturing Processes》2013,15(4):426-431
The application of controlled, low-frequency modulation (~100 Hz) superimposed onto the cutting process in the feed-direction – modulation-assisted machining (MAM) – is shown to be quite effective in reducing the wear of cubic boron nitride (CBN) tools when machining compacted graphite iron (CGI) at high machining speeds (>500 m/min). The tool life is at least 20 times greater than in conventional machining. This significant reduction in wear is a consequence of the multiple effects realized by MAM, including periodic disruption of the tool–workpiece contact, formation of discrete chips, enhanced fluid action and lower cutting temperatures. The propensity for thermochemical wear of CBN, the principal wear mode at high speeds in CGI machining, is thus reduced. The tool wear in MAM is also found to be smaller at the higher cutting speeds (730 m/min) tested. The feed-direction MAM appears feasible for implementation in industrial machining applications involving high speeds. 相似文献