全文获取类型
收费全文 | 1041篇 |
免费 | 64篇 |
国内免费 | 68篇 |
专业分类
安全科学 | 115篇 |
废物处理 | 18篇 |
环保管理 | 258篇 |
综合类 | 357篇 |
基础理论 | 146篇 |
污染及防治 | 42篇 |
评价与监测 | 21篇 |
社会与环境 | 147篇 |
灾害及防治 | 69篇 |
出版年
2024年 | 2篇 |
2023年 | 11篇 |
2022年 | 26篇 |
2021年 | 24篇 |
2020年 | 41篇 |
2019年 | 29篇 |
2018年 | 13篇 |
2017年 | 29篇 |
2016年 | 29篇 |
2015年 | 31篇 |
2014年 | 38篇 |
2013年 | 60篇 |
2012年 | 57篇 |
2011年 | 71篇 |
2010年 | 38篇 |
2009年 | 47篇 |
2008年 | 34篇 |
2007年 | 75篇 |
2006年 | 59篇 |
2005年 | 49篇 |
2004年 | 52篇 |
2003年 | 51篇 |
2002年 | 43篇 |
2001年 | 48篇 |
2000年 | 39篇 |
1999年 | 25篇 |
1998年 | 18篇 |
1997年 | 15篇 |
1996年 | 27篇 |
1995年 | 16篇 |
1994年 | 18篇 |
1993年 | 18篇 |
1992年 | 14篇 |
1991年 | 3篇 |
1990年 | 7篇 |
1989年 | 3篇 |
1988年 | 2篇 |
1987年 | 5篇 |
1986年 | 1篇 |
1985年 | 2篇 |
1982年 | 1篇 |
1981年 | 1篇 |
1977年 | 1篇 |
排序方式: 共有1173条查询结果,搜索用时 10 毫秒
341.
草海是滇池的一部分,大量污水排入使草海水体污染日益严重,水体已达重富营养化水平,生态平衡遭受严重破坏,水功能基本丧失。为了保护滇池,必须彻底根治草海,对草海的根治拟采取如下综合成套技术:①改造城市排水系统;②对重点工业废水中的有毒有害污染物进行治理;③城市面源治理;④草海底泥疏挖;⑤污染物现场清除技术;⑥大型水生植物恢复技术;⑦水资源的合理调整。制定了草海及滇池治理的三期规划,实施总投资约30亿人民币。 相似文献
342.
中国有害废物污染现状与控制对策探讨 总被引:12,自引:0,他引:12
我国有害废物对土壤,水体,大气及生物污染相当严重,在一些地区已构成了对人体健康的影响和威胁,已成为当前亟待解决的一个重大环境问题。本文介绍我国有害废物的污染现状,并通过对国内外有废物污染控制技术和管理水平的综合分析与对照,结合国情提出了我国有害废物污染对策和建议。 相似文献
343.
我国乡村城市化中的环境问题及其对策 总被引:1,自引:0,他引:1
本文主要论述了我国乡村城市化过程中出现的环境问题,并提出了相应的对策。并通过实例说明加强小城镇的规划、正确进行功能分区、促进乡镇工业结构优化在解决小城镇环境问题中的重要作用。 相似文献
344.
Jae S. Choi 《Environmental monitoring and assessment》1998,49(2-3):281-290
In this paper, we examine the consequences of rapid climate change on lake ecosystems in terms of two main effects: variability effects and magnitude effects. How these factors influence life history selection is considered by focusing upon body size as a quantifiable and strong correlate of life history variation (Pianka 1970, McNab 1980, Charnov 1991). We then consider the relationship between the concept of biological diversity and the diversity of life history strategies in the context of rapid climate change. 相似文献
345.
346.
上海海洋经济发展战略 总被引:7,自引:0,他引:7
在沿海各国和地区都高度重视发展海洋经济的背景下,研究上海海洋经济发展战略,对进一步推进上海海洋经济发展,建设“海洋强市”具有重要的意义。开发海洋、发展海洋经济是提升上海国际竞争力,促进社会经济可持续发展,更好地服务于长江三角洲、长江流域乃至全国以及保障城市、国家安全的战略需要。目前,上海海洋经济的发展面临着一系列问题、困难和瓶颈制约,主要表现为:海洋产业结构有待优化提升;海陆互动机制有待进一步完善;河口岛屿资源开发利用程度严重不足;海洋生态环境保护与可持续发展形势依然严峻;海洋科技自主创新能力不强,科技资源亟需开发与整合。因此,从转变思想,树立海洋兴市的战略意识;整体规划,重点布局;产业升级,结构优化;海洋经济发展重在创新;大力发展岛屿经济;注重海洋生态保护与可持续发展7方面,提出了上海发展海洋经济的战略和重点。 相似文献
347.
Traffic mortality and the role of minor roads 总被引:1,自引:0,他引:1
van Langevelde F van Dooremalen C Jaarsma CF 《Journal of environmental management》2009,90(1):660-667
Roads have large impacts on wildlife, as they form one of the principal causes of mortality, and disturbance and fragmentation of habitat. These impacts are mainly studied and mitigated on major roads. It is, however, a widespread misconception that most animals are killed on major roads. In this paper, we argue that minor roads have a larger impact on wildlife with respect to habitat destruction, noise load and traffic mortality. We use data on traffic related deaths in badgers (Meles meles) in The Netherlands to illustrate that traffic mortality is higher on minor roads. We ask for a more extensive investigation of the environmental impacts of minor roads. Moreover, we argue that the success of mitigation on roads drastically increases when both major and minor roads are integrated in the planning of traffic flows. Therefore, we propose a strategy based on the concept of a "traffic-calmed area". Traffic-calmed areas create opportunities for wildlife by decreasing limitations for animal movement. We ask for further studies to estimate what size traffic-calmed areas should be to maintain minimum viable animal populations. 相似文献
348.
349.
青海省的主要灾害类型与防灾减灾对策 总被引:3,自引:2,他引:1
论述了青海地区常见的主要灾害类型及危害,并提出了防灾减灾的对策。 相似文献
350.
Yazvenko SB McDonald TL Blokhin SA Johnson SR Meier SK Melton HR Newcomer MW Nielson RM Vladimirov VL Wainwright PW 《Environmental monitoring and assessment》2007,134(1-3):45-73
Exxon Neftegas Limited, operator of the Sakhalin-1 consortium, is developing oil and gas reserves on the continental shelf
off northeast Sakhalin Island, Russia. DalMorNefteGeofizika (DMNG), on behalf of the Sakhalin-1 consortium, conducted a 3-D
seismic survey of the Odoptu license area during 17 August–9 September 2001. A portion of the primary known feeding area of
the endangered western gray whale (Eschrichtius robustus) is located adjacent to the seismic block. The data presented here were collected as part of daily monitoring to determine
if there was any measurable effect of the seismic survey on the distribution and abundance of western gray whales. Mitigation
and monitoring program included aerial surveys conducted between 19 July and 19 November using the methodology outlined by
the Southern California High Energy Seismic Survey team (HESS). These surveys provided documentation of the distribution,
abundance and bottom feeding activity of western gray whales in relation to seismic survey sounds. From an operations perspective,
the aerial surveys provided near real-time data on the location of whales in and outside the feeding area, and documented
whether whales were displaced out of an area normally used as feeding habitat. The objectives of this study were to assess
(a) temporal changes in the distribution and abundance of gray whales in relation to seismic survey, and (b) the influence
of seismic survey, environmental factors, and other variables on the distribution and abundance of gray whales within their
preferred feeding area adjacent to Piltun Bay. Multiple regression analysis revealed a limited redistribution of gray whales
southward within the Piltun feeding area when the seismic survey was fully operational. A total of five environmental and
other variables unrelated to seismic survey (date and proxies of depth, sea state and visibility) and one seismic survey-related
variable (seg3d, i.e., received sound energy accumulated over 3 days) had statistically significant effects on the distribution and abundance
of gray whales. The distribution of two to four gray whales observed on the surface (i.e., about five to ten whales in total)
has likely been affected by the seismic survey. However, the total number of gray whales observed within the Piltun feeding
area remained stable during the seismic survey.
M. W. Newcomer, Deceased. 相似文献