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   283篇
  免费   2篇
  国内免费   6篇
安全科学   2篇
废物处理   12篇
环保管理   31篇
综合类   121篇
基础理论   44篇
环境理论   1篇
污染及防治   56篇
评价与监测   9篇
社会与环境   15篇
  2023年   2篇
  2022年   2篇
  2021年   7篇
  2020年   2篇
  2019年   8篇
  2018年   12篇
  2017年   8篇
  2016年   15篇
  2015年   8篇
  2014年   8篇
  2013年   14篇
  2012年   14篇
  2011年   21篇
  2010年   12篇
  2009年   15篇
  2008年   8篇
  2007年   13篇
  2006年   10篇
  2005年   2篇
  2004年   6篇
  2003年   6篇
  2002年   9篇
  2001年   4篇
  1999年   5篇
  1998年   3篇
  1996年   2篇
  1995年   3篇
  1994年   3篇
  1993年   3篇
  1987年   2篇
  1986年   2篇
  1984年   3篇
  1969年   2篇
  1966年   2篇
  1964年   2篇
  1963年   3篇
  1962年   3篇
  1961年   2篇
  1959年   2篇
  1958年   4篇
  1957年   6篇
  1956年   2篇
  1955年   3篇
  1953年   2篇
  1940年   2篇
  1926年   1篇
  1921年   2篇
  1920年   2篇
  1919年   1篇
  1915年   3篇
排序方式: 共有291条查询结果,搜索用时 15 毫秒
261.
Cleaner production as a means for effective environmental management   总被引:2,自引:0,他引:2  
Cleaner production is a strategy to prevent emissions at the source and to initiate a continuous preventive improvement of environmental performance of organizations. In terms of Cleaner production the focus of management should be on prevention rather than on cure in avoiding environmental problems. The inclusion of commitment to prevention in the environmental policy is one prerequisite of the standard ISO 14001. But how can a formalized environmental management system help to start a process of continuous improvement and voluntary self regulation? We conclude from our experience that Cleaner production and ISO 14001 go well together and support each other in helping an organization to really decrease its environmental effect. Analysing environmental management systems introduced on the basis of Cleaner production projects demonstrates, that Cleaner production supplies management and employees with systematic tools to decrease the environmental impact and at the same time save costs from inefficient use of materials and energy and motivates the organization as well by creating awareness throughout the enterprise.  相似文献   
262.
263.
264.
265.
On an 85 km stretch of coastline along the western and northwestern edge of North West Cape Peninsula, Western Australia, are numerous beaches used for nesting by the green turtle Chelonia mydas. Many other beaches in the area are not so used. Nesting beaches displayed three characteristics that distinguished them from non-nesting beaches: the salinity of the sand moisture at nesting depth was lower, the salt content of surface sand was lower, and the beaches were sheltered from prevailing winds. Several beaches on which turtles did not nest exhibited these characteristics, but possessed sand platforms of reduced elevation above sea level. These observations are discussed in relation to the question of what cues green turtles use in selecting nesting beaches.  相似文献   
266.
Adverse reactions of the skin to light comprise a number of different dermatologic conditions. In light-‘allergies’ in the narrower sense non-ionised electromagnetic radiation (ultraviolet (UV)-A/-B radiation or visible light) provokes an immunologic or allergic skin reaction. These include solar urticaria, an, immunoglobulin E-mediated, immediate-type allergic photoreaction, photoallergic contact dermatitis and photoallergic (drug) exanthema, which are cell-mediated, delayed-type allergic photoreactions due to photosensitization, chronic actinic dermatitis and polymorphic light eruption. Beyond it there are nonimmunologic photosensitive and photoaggravated skin diseases, like exogenous and endogenous phototoxicity, xeroderma pigmentosum, which is based on a genetic defect, or the autoimmune disease lupus erythematosus.  相似文献   
267.
Indicator system and evaluation framework for sustainable development   总被引:2,自引:0,他引:2  
IntroductionThenotionofsustainabledevelopmentwasproposedintheWorldConservationStrategy(IUCN,1980).Itispointedoutthattheconservationandthesustainabledevelopmentaremutuallydependentandtheyshouldbeintegrated,wheretheconservationmeansthemanagementofhuman…  相似文献   
268.
269.
270.
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