全文获取类型
收费全文 | 1016篇 |
免费 | 5篇 |
国内免费 | 1篇 |
专业分类
安全科学 | 36篇 |
废物处理 | 32篇 |
环保管理 | 90篇 |
综合类 | 219篇 |
基础理论 | 265篇 |
环境理论 | 3篇 |
污染及防治 | 243篇 |
评价与监测 | 77篇 |
社会与环境 | 51篇 |
灾害及防治 | 6篇 |
出版年
2022年 | 4篇 |
2021年 | 10篇 |
2020年 | 9篇 |
2019年 | 6篇 |
2018年 | 21篇 |
2017年 | 34篇 |
2016年 | 27篇 |
2015年 | 24篇 |
2014年 | 24篇 |
2013年 | 63篇 |
2012年 | 38篇 |
2011年 | 53篇 |
2010年 | 39篇 |
2009年 | 39篇 |
2008年 | 60篇 |
2007年 | 58篇 |
2006年 | 49篇 |
2005年 | 28篇 |
2004年 | 27篇 |
2003年 | 40篇 |
2002年 | 33篇 |
2001年 | 23篇 |
2000年 | 30篇 |
1999年 | 14篇 |
1998年 | 8篇 |
1997年 | 7篇 |
1996年 | 9篇 |
1995年 | 16篇 |
1994年 | 9篇 |
1993年 | 14篇 |
1992年 | 9篇 |
1991年 | 7篇 |
1990年 | 5篇 |
1989年 | 7篇 |
1988年 | 9篇 |
1987年 | 8篇 |
1986年 | 5篇 |
1985年 | 7篇 |
1984年 | 14篇 |
1983年 | 4篇 |
1982年 | 9篇 |
1981年 | 10篇 |
1980年 | 9篇 |
1979年 | 17篇 |
1978年 | 10篇 |
1977年 | 13篇 |
1976年 | 13篇 |
1975年 | 12篇 |
1974年 | 4篇 |
1962年 | 4篇 |
排序方式: 共有1022条查询结果,搜索用时 15 毫秒
121.
122.
Kirsten Halsnæs Amit Garg John Christensen Helene Ystanes Føyn Maryna Karavai Emilio La Rovere Matthew Bramley Xianli Zhu Catherine Mitchell Joyashree Roy Kanako Tanaka Hidefumi Katayama Carlos Mena Imoh Obioh Igor Bashmakov Stanford Mwakasonda Myong-Kyoon Lee Marlene Vinluan Yu Joe Huang Laura Segafredo 《Mitigation and Adaptation Strategies for Global Change》2014,19(1):45-71
The aim of this paper is to assess how policy goals in relation to the promotion of green growth, energy security, pollution control and greenhouse gas (GHG) emissions reductions have been aligned in policies that have been implemented in selected countries during the last decades as a basis for discussing how a multi objective policy paradigm can contribute to future climate change mitigation. The paper includes country case studies from Brazil, Canada, China, the European Union (EU), India, Japan, Mexico, Nigeria, South Africa, South Korea and the United States covering renewable energy options, industry, transportation, the residential sector and cross-sectoral policies. These countries and regions together contribute more than two thirds of global GHG emissions. The paper finds that policies that are nationally driven and that have multiple objectives, including climate-change mitigation, have been widely applied for decades in both developing countries and industrialised countries. Many of these policies have a long history, and adjustments have taken place based on experience and cost effectiveness concerns. Various energy and climate-change policy goals have worked together in these countries, and in practice a mix of policies reflecting specific priorities and contexts have been pursued. In this way, climate-change mitigation has been aligned with other policy objectives and integrated into broader policy packages, though in many cases specific attention has not been given to the achievement of large GHG emission reductions. Based on these experiences with policy implementation, the paper highlights a number of key coordination and design issues that are pertinent to the successful joint implementation of several energy and climate-change policy goals. 相似文献
123.
As the use of ultrasonography has become a routine procedure in the care of pregnant women, fetal congenital malformations have been frequently diagnosed prenatally. During a 4-year period abdominal wall defects (AWD) were diagnosed in 14 cases, five were gastroschises and nine were omphaloceles, seven females and seven males. Concomitant malformations were present in one case of gastroschisis and in five cases of omphalocele. Eleven AWD's were diagnosed in the second trimester and six pregnancies were interrupted. Eight children with AWD were born; two boys with omphalocele and one girl and one boy with gastroschisis are still alive. Alpha-fetoprotein was determined in amniotic fluid in 11 cases and also in maternal serum prior to the amniocentesis in eight cases. Chromosomal investigations were performed in 13 cases, 11 on amniotic fluid cells and two on lymphocytes from a blood sample made postnatally. Two abnormal karyotypes, 47,XX + 18 were found. 相似文献
124.
125.
126.
127.
128.
129.