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   43954篇
  免费   465篇
  国内免费   367篇
安全科学   1219篇
废物处理   1996篇
环保管理   5458篇
综合类   8541篇
基础理论   10944篇
环境理论   18篇
污染及防治   10656篇
评价与监测   2975篇
社会与环境   2749篇
灾害及防治   230篇
  2022年   359篇
  2021年   421篇
  2020年   255篇
  2019年   343篇
  2018年   632篇
  2017年   633篇
  2016年   998篇
  2015年   747篇
  2014年   1147篇
  2013年   3360篇
  2012年   1377篇
  2011年   1832篇
  2010年   1515篇
  2009年   1611篇
  2008年   1897篇
  2007年   1917篇
  2006年   1702篇
  2005年   1461篇
  2004年   1468篇
  2003年   1421篇
  2002年   1320篇
  2001年   1572篇
  2000年   1071篇
  1999年   717篇
  1998年   527篇
  1997年   558篇
  1996年   584篇
  1995年   645篇
  1994年   596篇
  1993年   519篇
  1992年   523篇
  1991年   535篇
  1990年   495篇
  1989年   472篇
  1988年   434篇
  1987年   374篇
  1986年   376篇
  1985年   387篇
  1984年   407篇
  1983年   394篇
  1982年   417篇
  1981年   354篇
  1980年   294篇
  1979年   311篇
  1978年   287篇
  1977年   252篇
  1975年   239篇
  1974年   231篇
  1973年   262篇
  1967年   242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 - Arsenic (As) concentrations and deposition fluxes were measured in snow and rime at 10 mountain-top sites near the borders between the Czech Republic...  相似文献   
2.
3.
Russian Journal of Ecology - A new method for assessing the response of biota to climatic changes in the ecosystem has been tested. In the Central Forest Natural Biosphere Reserve, the average...  相似文献   
4.
Environment, Development and Sustainability - Sugarcane is an industrial crop globally used for producing biofuels and bioproducts and is the only source of white sugar in Bangladesh. However,...  相似文献   
5.
Environment, Development and Sustainability - Globally, traditional knowledge is at stake, notwithstanding intentions recorded in international policy conventions. Egypt has accepted and ratified...  相似文献   
6.
Russian Journal of Ecology - Climate change entails shifts in the ranges of woody plants along both latitudinal and altitudinal gradients in the boreal forest biome. In this study,...  相似文献   
7.
Environmental Science and Pollution Research - Lake Mariut Main Basin (MB) is not only one of the three basins composing Lake Mariut (LM) but is also the main source of the popular tilapia fish to...  相似文献   
8.
Environmental Science and Pollution Research - A Correction to this paper has been published: https://doi.org/10.1007/s11356-021-13406-7  相似文献   
9.
Environmental Science and Pollution Research - The aim of this study is to describe the existence of the inflammatory marker nuclear factor kappa light chain B lymphocyte protein (NF-?B P65)...  相似文献   
10.
Municipal solid waste (MSW) is one of the most well-known biomass resources that can be utilized to produce renewable energy. Numerous countries are plagued by the proliferation of waste, particularly organic waste that can be utilized for energy recovery. Palestine suffers from inefficient solid waste management, and only recently have a few projects focused on bioenergy production been implemented. Throughout the years, the city of Tulkarm experiences power outages which cause a challenge to the Palestine Technical University-Kadoorie campus in Tulkarm. Thus, the possibility of energy recovery from the organic portion in Palestine Technical University-Kadoorie was evaluated. The analysis of an economic impact included discussions of a number of economic aspects, including Levelized cost of energy, internal rate of return, present worth, annual worth, and payback period. On the other hand, a carbon dioxide savings analysis and gas emission were evaluated. The outcomes of the energy optimization demonstrated that the suggested system could supply the institution with an average of roughly 7 MWh of electrical energy. According to the economic study, this project offers 0.25 million dollars in present value, 0.144 million dollars in annual value, a 13 percent internal rate of return, a payback period of 6 years, and a levelized cost of energy of 0.11 dollars for each kWh generated. Additionally, the environmental assessment revealed that this system might reduce CO2 emissions by around 8,343,778 tons. For effective waste management, energy recovery, and emission reduction, it is advised to implement anaerobic digestion technology.  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