全文获取类型
收费全文 | 16188篇 |
免费 | 95篇 |
国内免费 | 743篇 |
专业分类
安全科学 | 224篇 |
废物处理 | 1160篇 |
环保管理 | 1782篇 |
综合类 | 2535篇 |
基础理论 | 4828篇 |
环境理论 | 3篇 |
污染及防治 | 3762篇 |
评价与监测 | 1418篇 |
社会与环境 | 1199篇 |
灾害及防治 | 115篇 |
出版年
2023年 | 48篇 |
2022年 | 168篇 |
2021年 | 160篇 |
2020年 | 95篇 |
2019年 | 112篇 |
2018年 | 1657篇 |
2017年 | 1611篇 |
2016年 | 1537篇 |
2015年 | 333篇 |
2014年 | 315篇 |
2013年 | 429篇 |
2012年 | 1189篇 |
2011年 | 1867篇 |
2010年 | 953篇 |
2009年 | 855篇 |
2008年 | 1146篇 |
2007年 | 1501篇 |
2006年 | 265篇 |
2005年 | 555篇 |
2004年 | 659篇 |
2003年 | 578篇 |
2002年 | 238篇 |
2001年 | 120篇 |
2000年 | 96篇 |
1999年 | 102篇 |
1998年 | 72篇 |
1997年 | 65篇 |
1996年 | 39篇 |
1995年 | 48篇 |
1994年 | 33篇 |
1993年 | 22篇 |
1992年 | 30篇 |
1991年 | 19篇 |
1990年 | 24篇 |
1989年 | 18篇 |
1988年 | 6篇 |
1987年 | 6篇 |
1986年 | 3篇 |
1985年 | 2篇 |
1984年 | 12篇 |
1983年 | 8篇 |
1982年 | 2篇 |
1981年 | 3篇 |
1975年 | 2篇 |
1974年 | 2篇 |
1972年 | 2篇 |
1967年 | 2篇 |
1966年 | 2篇 |
1958年 | 3篇 |
1935年 | 2篇 |
排序方式: 共有10000条查询结果,搜索用时 586 毫秒
391.
随着社会经济的飞速发展,人民生活对水资源的需求量日益增加,水资源开发已然成为备受社会各界关注的一项话题。而若是未能重视资源开发合理性与适宜性,必然会造成一定的环境污染。本文阐述了我国水资源开发与利用现状,分析了地下水开发引起的环境问题,并探究了新形势下治理地下水开发环境问题的有效对策。 相似文献
392.
Hewitt Richard J. Pera Florencia A. Garca-Martn Mara Gaudry-Sada Karl-Heinz Hernndez-Jimnez Vernica Bieling Claudia 《Environmental management》2020,65(3):334-354
Environmental Management - Landscapes are changing, with rural areas becoming increasingly urbanized. Children and adolescents are underrepresented in the sense-of-place literature. Our study aimed... 相似文献
393.
Zihao Li Yang Geng Lei Ma Xiaoyin Chen Junhua Li Huazhen Chang Johannes W. Schwank 《Frontiers of Environmental Science & Engineering》2020,14(4):65
394.
Lucon Thiago Nogueira Costa Adivane Terezinha Galvão Paulo Leite Mariangela Garcia Praça 《Environmental science and pollution research international》2020,27(9):8965-8979
Environmental Science and Pollution Research - Karst regions are important water providers, supplying approximately 25% of the world population. These areas present higher vulnerability to... 相似文献
395.
Pompermaier Aline Kirsten Karina Soares Suelen Mendonça Fortuna Milena Kalichak Fabiana Idalencio Renan Koakoski Gessi Barreto Rodrigo Egydio Barcellos Leonardo José Gil 《Environmental science and pollution research international》2020,27(31):38559-38567
Environmental Science and Pollution Research - Due to human activities, there is an increasing presence of agrochemicals residues in water bodies, which could be attributed to an increased use of... 相似文献
396.
Shu Heping Ma Jinzhu Guo Jiabing Qi Shi Guo Zizheng Zhang Peng 《Environmental science and pollution research international》2020,27(30):37455-37467
Environmental Science and Pollution Research - Slope failure is a one of major process that causes severe landform variation and environment variation, and slope failure has become a major hidden... 相似文献
397.
García del Barrio JM Ortega M Vázquez De la Cueva A Elena-Rosselló R 《Environmental monitoring and assessment》2006,119(1-3):137-159
This paper mainly aims to study the linear element influence on the estimation of vascular plant species diversity in five Mediterranean landscapes modeled as land cover patch mosaics. These landscapes have several core habitats and a different set of linear elements -habitat edges or ecotones, roads or railways, rivers, streams and hedgerows on farm land- whose plant composition were examined. Secondly, it aims to check plant diversity estimation in Mediterranean landscapes using parametric and non-parametric procedures, with two indices: Species richness and Shannon index.Land cover types and landscape linear elements were identified from aerial photographs. Their spatial information was processed using GIS techniques. Field plots were selected using a stratified sampling design according to relieve and tree density of each habitat type. A 50×20 m2 multi-scale sampling plot was designed for the core habitats and across the main landscape linear elements. Richness and diversity of plant species were estimated by comparing the observed field data to ICE (Incidence-based Coverage Estimator) and ACE (Abundance-based Coverage Estimator) non-parametric estimators.The species density, percentage of unique species, and alpha diversity per plot were significantly higher (p < 0.05) in linear elements than in core habitats. ICE estimate of number of species was 32% higher than of ACE estimate, which did not differ significantly from the observed values. Accumulated species richness in core habitats together with linear elements, were significantly higher than those recorded only in the core habitats in all the landscapes. Conversely, Shannon diversity index did not show significant differences. 相似文献
398.
399.
400.
填埋场沼气发电的温室气体减排效益分析 总被引:2,自引:0,他引:2
填埋场沼气是垃圾卫生填埋场产生的可利用资源.以深圳下坪垃圾填埋场为例,定量分析垃圾填埋气体发电的温室气体减排效益.结果表明,填埋场沼气发电具有很好的经济效益和环境效益,可作为与发达国家进行CDM(清洁发展机制)项目合作的优先技术领域. 相似文献