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   17590篇
  免费   1233篇
  国内免费   6056篇
安全科学   1655篇
废物处理   955篇
环保管理   1535篇
综合类   10354篇
基础理论   2924篇
环境理论   2篇
污染及防治   5050篇
评价与监测   880篇
社会与环境   779篇
灾害及防治   745篇
  2024年   44篇
  2023年   299篇
  2022年   908篇
  2021年   854篇
  2020年   736篇
  2019年   572篇
  2018年   709篇
  2017年   842篇
  2016年   795篇
  2015年   1055篇
  2014年   1354篇
  2013年   1769篇
  2012年   1567篇
  2011年   1591篇
  2010年   1342篇
  2009年   1314篇
  2008年   1326篇
  2007年   1104篇
  2006年   1006篇
  2005年   705篇
  2004年   553篇
  2003年   582篇
  2002年   511篇
  2001年   455篇
  2000年   446篇
  1999年   372篇
  1998年   396篇
  1997年   337篇
  1996年   294篇
  1995年   229篇
  1994年   164篇
  1993年   167篇
  1992年   139篇
  1991年   100篇
  1990年   72篇
  1989年   38篇
  1988年   32篇
  1987年   16篇
  1986年   17篇
  1985年   12篇
  1984年   14篇
  1983年   12篇
  1982年   10篇
  1981年   8篇
  1975年   2篇
  1974年   2篇
  1972年   2篇
  1971年   1篇
  1968年   1篇
  1923年   1篇
排序方式: 共有10000条查询结果,搜索用时 16 毫秒
1.
Environmental Science and Pollution Research - The existing literature on the environmental Kuznets curve (EKC) fails to investigate the spatial attribute of the “pollution halo” effect...  相似文献   
2.
Environmental Science and Pollution Research - Growing environmental pressure urges China to develop in a sustainable and low carbon way, and thus China strives to achieve a carbon peak by 2030 and...  相似文献   
3.
Environmental Science and Pollution Research - The impact of high concentrations of air pollution on COVID-19 has been a major air quality and life safety issue in recent studies. This study aimed...  相似文献   
4.
The CO2 absorption capacities of potassium glycinate, potassium sarcosinate (choline, proline), mono-ethanolamine (MEA), and tri-ethanolamine were evaluated to find the optimal absorbent for separating CO2 from gaseous products by a CO2 purification process. The absorption loading, desorption efficiency, cost, and environmental tolerance were assessed to select the optimal absorbent. MEA was found to be the optimum absorbent for separating the CO2 and H2 mixture in gaseous product. The maximum absorption loading rate was 0.77 mol CO2 per mol MEA at temperature of 20°C and absorbent concentration of 2.5 mol/L, whereas desorption efficiency was 90% by heating for 3 h at 130°C. MEA was found to be an optimal absorbent for the purification process of CO2 during gaseous production.  相似文献   
5.
Environmental Science and Pollution Research - Phosphorus is an essential macro-mineral nutrient for poultry, needed for the body growth, development of bones, genomic function, good...  相似文献   
6.
Tang  Zhi  Li  Yilian  Yang  Zhe  Liu  Danqing  Tang  Min  Yang  Sen  Tang  Ye 《Environmental science and pollution research international》2019,26(20):20277-20285
Environmental Science and Pollution Research - The sorption/desorption behaviors of benzene, toluene, ethylbenzene, and xylene (BTEX) on soil organic matter (SOM) have a significant influence on...  相似文献   
7.
Land degradation is a global problem that seriously threatens human society. However, in China and elsewhere, ecological restoration still largely relies on a traditional approach that focuses only on ecological factors and ignores socioeconomic factors. To improve the effectiveness of ecological restoration and maximize its economic and ecological benefits, a more efficient approach is needed that provides support for policy development and land management and thereby promotes environmental conservation. We devised a framework for assessing the value of ecosystem services that remain after subtracting costs, such as the opportunity costs, costs of forest protection, and costs for the people who are affected by the program; that is, the net value of ecosystem services (NVES). To understand the difference between the value of a resource and the net value of the ecosystem service it provides, we used data on VES, timber sales, and afforestation costs from China's massive national afforestation programs to calculate the net value of forest ecosystem services in China. Accounting for the abovementioned costs revealed an NVES of ¥6.1 × 1012 for forests in 2014, which was 35.9% less than the value calculated without accounting for costs. As a result, the NVES associated with afforestation was 55.9% less than the NVES of natural forests. In some regions, NVES was negative because of the huge costs of human-made plantations, high evapotranspiration rates (thus, high water opportunity costs), and low forest survival rates. To maximize the ecological benefits of conservation, it is necessary to account for as many costs as possible so that management decisions can be based on NVES, thereby helping managers choose projects that maximize both economic and ecological benefits.  相似文献   
8.
Environmental Science and Pollution Research - A Correction to this paper has been published: https://doi.org/10.1007/s11356-021-15526-6  相似文献   
9.
Journal of Material Cycles and Waste Management - The traditional Chinese medicinal plant Magnolia officinalis has a wide range of applications; including more than 200 kinds of patented Chinese...  相似文献   
10.
各位理事、各位来宾、同志们、朋友们: 为期三天的中国安全防范产品行业协会第三届第三次理事(扩大)会议,完成了各项预定议程,顺利结束.  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