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   64010篇
  免费   636篇
  国内免费   704篇
安全科学   1826篇
废物处理   3263篇
环保管理   8340篇
综合类   9573篇
基础理论   17326篇
环境理论   27篇
污染及防治   15589篇
评价与监测   4654篇
社会与环境   4389篇
灾害及防治   363篇
  2022年   541篇
  2021年   576篇
  2020年   396篇
  2019年   485篇
  2018年   2113篇
  2017年   2074篇
  2016年   2326篇
  2015年   1104篇
  2014年   1529篇
  2013年   4525篇
  2012年   2271篇
  2011年   3678篇
  2010年   2707篇
  2009年   2611篇
  2008年   3271篇
  2007年   3538篇
  2006年   2291篇
  2005年   1999篇
  2004年   1882篇
  2003年   1999篇
  2002年   1857篇
  2001年   2170篇
  2000年   1514篇
  1999年   925篇
  1998年   696篇
  1997年   666篇
  1996年   695篇
  1995年   827篇
  1994年   765篇
  1993年   648篇
  1992年   694篇
  1991年   680篇
  1990年   680篇
  1989年   645篇
  1988年   565篇
  1987年   488篇
  1986年   443篇
  1985年   478篇
  1984年   535篇
  1983年   497篇
  1982年   508篇
  1981年   433篇
  1980年   350篇
  1979年   386篇
  1978年   325篇
  1977年   264篇
  1975年   275篇
  1973年   271篇
  1972年   268篇
  1971年   251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