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   87917篇
  免费   1405篇
  国内免费   1133篇
安全科学   3602篇
废物处理   3285篇
环保管理   13956篇
综合类   19255篇
基础理论   26169篇
环境理论   74篇
污染及防治   14499篇
评价与监测   5382篇
社会与环境   3664篇
灾害及防治   569篇
  2022年   757篇
  2021年   817篇
  2020年   707篇
  2019年   854篇
  2018年   1022篇
  2017年   1164篇
  2016年   2173篇
  2015年   1804篇
  2014年   2608篇
  2013年   9308篇
  2012年   2252篇
  2011年   2573篇
  2010年   3320篇
  2009年   3463篇
  2008年   2062篇
  2007年   1924篇
  2006年   2285篇
  2005年   2245篇
  2004年   2576篇
  2003年   2387篇
  2002年   1935篇
  2001年   2181篇
  2000年   1891篇
  1999年   1446篇
  1998年   1333篇
  1997年   1324篇
  1996年   1445篇
  1995年   1577篇
  1994年   1463篇
  1993年   1313篇
  1992年   1301篇
  1991年   1277篇
  1990年   1232篇
  1989年   1189篇
  1988年   1038篇
  1987年   971篇
  1986年   986篇
  1985年   1066篇
  1984年   1161篇
  1983年   1160篇
  1982年   1174篇
  1981年   1095篇
  1980年   943篇
  1979年   926篇
  1978年   817篇
  1977年   713篇
  1976年   632篇
  1975年   599篇
  1973年   631篇
  1972年   633篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
1.
Environmental Science and Pollution Research - This work presents a bibliographic review of the literature regarding the simultaneous removal of contaminants of emerging concern (CECs) and...  相似文献   
2.
3.
Environmental Science and Pollution Research - The discovery of microRNAs (miRNAs) 20 years ago has advocated a new era of “small molecular genetics.” About 2000 miRNAs are present that...  相似文献   
4.
Environmental Science and Pollution Research - Marine and freshwater pollution caused by transport of invasive species in shipping ballast water is a major global problem and will increase in...  相似文献   
5.
Russian Journal of Ecology - In this paper, Ellenberg’s indicator values were estimated in order to soil nitrogen (N), pH (R) and soil moisture (M) in different subalpine grassland...  相似文献   
6.
水流与结构相互作用下的防污帘有效深度是影响其防污效果的关键因素.为探究防污帘有效深度随流速等参数的变化,基于ADINA软件动网格控制技术,结合双向流固耦合方法建立悬挂式防污帘大变形二维有限元数值模型,以分析流速、帘长及配重对防污帘有效深度的影响规律.运用防污帘变形倾角,描述悬挂式防污帘在不同负载下的变形特征,并回归拟合防污帘相对有效深度的预测经验公式.结果表明:悬挂式防污帘相对有效深度随流速增大而减小,随相对帘长与配重的增大而增大;倾角随流速与相对帘长的增大而增大,随配重的增大而减小.  相似文献   
7.
The provision of ecosystem services is a prominent rationale for urban greening, and there is a prevailing mantra that ‘trees are good’. However, understanding how urban trees contribute to sustainability must also consider disservices. In this perspective article, we discuss recent research on ecosystem disservices of urban trees, including infrastructure conflicts, health and safety impacts, aesthetic issues, and environmentally detrimental consequences, as well as management costs related to ecological disturbances and risk management. We also discuss tradeoffs regarding species selection and local conservation concerns, as well as the central role of human perception in the interpretation of ecosystem services and disservices, particularly the uncritical assertion that ‘everybody loves trees’. Urban forestry decision-making that fails to account for disservices can have unintended negative consequences for communities. Further research is needed regarding life cycle assessments, stakeholder decision-making, return-on-investment, and framings of services and disservices in urban forestry.  相似文献   
8.
Environmental Science and Pollution Research - We studied the removal of 61 emerging micropollutants, including illicit drugs, in a biofilter wastewater treatment plant located in the French Indies...  相似文献   
9.
Urban greening increases vegetation and can restore ecological functions to urban systems. It has ties to restoration ecology, which aims to return degraded land to diverse, functional ecosystems. Both practices can be applied to maximizing ecosystem services and habitat in vacant lots, which are abundant in post-industrial cities, including Chicago, Illinois (USA), where our study took place. We tested four methods for increasing native plant diversity in vacant lots, ranging from low input to resource-intensive: seed bombing, broadcast seeding, planting plugs, and gardening. After three growing seasons, we assessed the growth of eight target native species and all non-target species. We expected that intensive treatments would have more target species stems and flowers and fewer non-target species, but we found that less-intensive options often produce equal or better results. From this, we recommend broadcast seeding as a viable, low-cost method for improving habitat and biodiversity in vacant lots.Electronic supplementary materialThe online version of this article (10.1007/s13280-020-01383-z) contains supplementary material, which is available to authorized users.  相似文献   
10.
Environmental Science and Pollution Research - Traditional medicine (TM) also known as folk medicine consists of medical knowledge systems that were developed over generations in various countries...  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