首页 | 本学科首页   官方微博 | 高级检索  
文章检索
  按 检索   检索词:      
出版年份:   被引次数:   他引次数: 提示:输入*表示无穷大
  收费全文   4680篇
  免费   14篇
  国内免费   57篇
安全科学   115篇
废物处理   271篇
环保管理   420篇
综合类   575篇
基础理论   1412篇
环境理论   2篇
污染及防治   1281篇
评价与监测   370篇
社会与环境   294篇
灾害及防治   11篇
  2023年   22篇
  2022年   86篇
  2021年   84篇
  2020年   44篇
  2019年   52篇
  2018年   177篇
  2017年   191篇
  2016年   275篇
  2015年   105篇
  2014年   116篇
  2013年   235篇
  2012年   527篇
  2011年   350篇
  2010年   121篇
  2009年   114篇
  2008年   131篇
  2007年   166篇
  2006年   135篇
  2005年   449篇
  2004年   573篇
  2003年   445篇
  2002年   82篇
  2001年   58篇
  2000年   37篇
  1999年   43篇
  1998年   14篇
  1997年   15篇
  1996年   9篇
  1995年   17篇
  1994年   6篇
  1993年   3篇
  1992年   7篇
  1991年   7篇
  1990年   6篇
  1989年   6篇
  1988年   2篇
  1987年   2篇
  1985年   2篇
  1983年   2篇
  1979年   2篇
  1975年   3篇
  1974年   2篇
  1972年   2篇
  1969年   2篇
  1967年   3篇
  1966年   2篇
  1965年   2篇
  1963年   2篇
  1956年   2篇
  1915年   1篇
排序方式: 共有4751条查询结果,搜索用时 15 毫秒
61.
Conventional wastewater treatments are not efficient in removing parabens, which may thus end up in surface waters, posing a threat to aquatic biota and hu  相似文献   
62.
Identifying and characterising the factors that determine why a local authority opts for a particular way of managing its waste collection service is an important issue, warranting research interest in the field of municipal solid waste (MSW) management. This paper presents empirical evidence spanning a broad time horizon (2002–2010) showing that economic and political factors impact in different ways on the provision of waste management services. We examine five alternatives in this area, including public and private service delivery formulas and, within each field, individual and joint options. Our findings highlight the importance of the service cost and that of the various indicators of fiscal stress as determinant factors of management decisions regarding the provision of MSW management services.  相似文献   
63.
Conflicts between local people's livelihoods and conservation have led to many unsuccessful conservation efforts and have stimulated debates on policies that might simultaneously promote sustainable management of protected areas and improve the living conditions of local people. Many government‐sponsored payments‐for‐ecosystem‐services (PES) schemes have been implemented around the world. However, few empirical assessments of their effectiveness have been conducted, and even fewer assessments have directly measured their effects on ecosystem services. We conducted an empirical and spatially explicit assessment of the conservation effectiveness of one of the world's largest PES programs through the use of a long‐term empirical data set, a satellite‐based habitat model, and spatial autoregressive analyses on direct measures of change in an ecosystem service (i.e., the provision of wildlife species habitat). Giant panda (Ailuropoda melanoleuca) habitat improved in Wolong Nature Reserve of China after the implementation of the Natural Forest Conservation Program. The improvement was more pronounced in areas monitored by local residents than those monitored by the local government, but only when a higher payment was provided. Our results suggest that the effectiveness of a PES program depends on who receives the payment and on whether the payment provides sufficient incentives. As engagement of local residents has not been incorporated in many conservation strategies elsewhere in China or around the world, our results also suggest that using an incentive‐based strategy as a complement to command‐and‐control, community‐ and norm‐based strategies may help achieve greater conservation effectiveness and provide a potential solution for the park versus people conflict.  相似文献   
64.
Environmental Science and Pollution Research - For the photocatalytic degradation of antioxidant 2,6-di-tert-butyl-hydroxytoluene (BHT), several TiO2-based composites have been prepared in MWCNT...  相似文献   
65.
Environmental Science and Pollution Research - The order Odonata has been regularly used as an indicator of the ecosystem’s condition. The objective of this review was to analyze the...  相似文献   
66.
Environmental Science and Pollution Research - In this work, the activated persulfate oxidation of ciprofloxacin (CIP) using a low-grade titanium ore under sunlight or simulated sunlight were...  相似文献   
67.
Environmental Science and Pollution Research - This work proposes a novel approach for the coupling of ozonation and Fenton processes using a new prototype of a high rotation bubble reactor (HRBR),...  相似文献   
68.
Environmental Science and Pollution Research - The process TiO2/PAC/UV-vis has been under study and compared with the isolated treatments of adsorption and photocatalysis determining possible...  相似文献   
69.
Environmental Science and Pollution Research - It has recently been proven that epigenetic dysregulation is importantly involved in cell transformation and therefore induces cancerous diseases. The...  相似文献   
70.
Environmental Science and Pollution Research - Glyphosate is the most used herbicide worldwide. Many studies have reported glyphosate risks to aquatic organisms of different trophic levels....  相似文献   
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号