全文获取类型
收费全文 | 2589篇 |
免费 | 135篇 |
国内免费 | 316篇 |
专业分类
安全科学 | 263篇 |
废物处理 | 101篇 |
环保管理 | 1076篇 |
综合类 | 854篇 |
基础理论 | 276篇 |
环境理论 | 2篇 |
污染及防治 | 130篇 |
评价与监测 | 99篇 |
社会与环境 | 158篇 |
灾害及防治 | 81篇 |
出版年
2024年 | 2篇 |
2023年 | 21篇 |
2022年 | 45篇 |
2021年 | 46篇 |
2020年 | 68篇 |
2019年 | 43篇 |
2018年 | 32篇 |
2017年 | 66篇 |
2016年 | 76篇 |
2015年 | 67篇 |
2014年 | 69篇 |
2013年 | 92篇 |
2012年 | 103篇 |
2011年 | 122篇 |
2010年 | 86篇 |
2009年 | 94篇 |
2008年 | 94篇 |
2007年 | 83篇 |
2006年 | 63篇 |
2005年 | 63篇 |
2004年 | 89篇 |
2003年 | 103篇 |
2002年 | 196篇 |
2001年 | 169篇 |
2000年 | 185篇 |
1999年 | 151篇 |
1998年 | 128篇 |
1997年 | 90篇 |
1996年 | 223篇 |
1995年 | 67篇 |
1994年 | 26篇 |
1993年 | 19篇 |
1992年 | 10篇 |
1991年 | 8篇 |
1990年 | 10篇 |
1989年 | 11篇 |
1988年 | 5篇 |
1987年 | 3篇 |
1986年 | 2篇 |
1985年 | 39篇 |
1984年 | 56篇 |
1983年 | 53篇 |
1982年 | 14篇 |
1981年 | 4篇 |
1980年 | 11篇 |
1979年 | 2篇 |
1978年 | 6篇 |
1977年 | 5篇 |
1975年 | 3篇 |
1971年 | 16篇 |
排序方式: 共有3040条查询结果,搜索用时 500 毫秒
931.
Philip M. Fearnside 《Environmental management》1997,21(4):553-570
932.
Ruud Pleune 《Environmental management》1997,21(5):733-745
2 problem, which brought the issue into the energy debate, as well as the more general definition of the problem in the late
1980s as a greenhouse problem, were very important for determining the strategies of the organizations. It can be concluded
that strategies of Dutch environmental organizations with regard to climate change were strongly dependent on the context. 相似文献
933.
长三角地区石油和化工行业上市公司绿色竞争力的实证研究 总被引:4,自引:0,他引:4
企业绿色竞争力是企业在“绿色化”的前提下,与对手相比的一种竞争优势。石油和化工行业是能源和资源的生产和消耗大户.也是众所周知的重污染行业.对石油和化工企业的绿色竞争力进行实证研究具有重要意义。本文以长三角地区的石油和化工行业上市公司为案例。构建基于DEA法的绿色竞争力评价模型.评估了它们的绿色竞争力。实证结果显示:长三角地区石油和化工企业的绿色竞争力还有待加强.在此基础上提出了石油和化工企业提高绿色竞争力的一些具体措施。 相似文献
934.
金龙 《中国环境管理干部学院学报》2007,17(4):54-57
渔业环境权是渔业权人在得到许可的渔业水域从事养殖、捕捞等生产活动时所拥有的保护渔业水域环境的权利。根据物权理论,渔业环境权是一种基于国家对渔业水域的所有权上派生的用益物权,是《物权法》中养殖权和捕捞权的构成要件,它同养殖或捕捞水生动(植)物的所有权、对得到许可的水域(水体)的占有或使用权一起,构成完整的养殖权或捕捞权。这就是现行法律制度没有规定独立的渔业环境权的原因。 相似文献
935.
936.
根据福建省灾害性气象年鉴和福建省气候影响评价资料,建立以县域为单元的福建省台风灾害数据库,运用Excel软件和M ap info技术,重建了1980~2005年福建台风灾害时空动态格局。研究表明:福建台风灾害年际变化总体呈波动上升趋势,年内80%左右集中在7~9月份,群发性强。空间上集中在沿海地区,灾情明显存在3个高值中心,即闽中的莆田、福清、长乐和平潭,闽南的漳浦、云霄和诏安,闽东北的霞浦和福鼎;致灾因子与灾情灾次比空间分布错位,体现承灾体脆弱性对台风灾害的影响。分阶段研究表明:台风灾害致灾因子变化不太明显,但灾情呈明显增强趋势,进一步反映环境不稳定性和承灾体脆弱性对台风灾害的影响机制。 相似文献
937.
Nonpoint-Source Agricultural Hazard Index: A Case Study of the Province of Cremona, Italy 总被引:1,自引:0,他引:1
This paper reports the results of a study aimed at the evaluation of the hazard level of farming activities in the province
of Cremona, Italy, with particular reference to groundwater. The applied methodology employs a parametric approach based on
the definition of potential hazard indexes (nonpoint-source agricultural hazard indexes, NPSAHI). Two categories of parameters
were considered: the hazard factors (HF), which represent all farming activities that cause or might cause an impact on groundwater
(use of fertilizers and pesticides, application of livestock and poultry manure, food industry wastewater, and urban sludge),
and the control factors (CF), which adapt the hazard factor to the characteristics of the site (geographical location, slope,
agronomic practices, and type of irrigation). The hazard index (HI) can be calculated multiplying the hazard factors by the
control factors and, finally, the NPSAHI are obtained dividing HI into classes on a percentile basis using a scale ranging
from 1 to 10. Organization, processing, and display of all data layers were performed using the geographical information system
(GIS) ArcView and its Spatial Analyst extension. Results show that the potential hazard of groundwater pollution by farming
activities in the province of Cremona falls mainly in the fifth class (very low hazard). 相似文献
938.
BURGER J 《Environmental management》2000,26(5):469-478
With the ending of the Cold War, several federal agencies are reclaiming land through remediation and restoration and are
considering potential future land uses that are compatible with current uses and local needs. Some sites are sufficiently
contaminated that it is likely that the responsible federal agency will retain control over the land for the foreseeable future,
providing them with a stewardship mission. This is particularly true of some of the larger Department of Energy (DOE) facilities
contaminated during the production of nuclear weapons. The use of the term “restoration” is explored in this paper because
the word means different things to the public, ecologists, and environmental managers responsible for contaminated sites,
such as Superfund sites and the DOE facilities. While environmental restoration usually refers to remediation and removal
of hazardous wastes, ecological restoration refers to the broader process of repairing damaged ecosystems and enhancing their
productivity and/or biodiversity. The goals of the two types of restoration can be melded by considering environmental restoration
as a special case of ecological restoration, one that involves risk reduction from hazardous wastes, and by broadening environmental
restoration to include a more extensive problem-formulation phase (both temporal and spatial), which includes the goal of
reestablishing a functioning ecosystem after remediation. Further, evaluating options for the desired post remediation result
will inform managers and policy-makers concerning the feasibility and efficacy of environmental restoration itself. 相似文献
939.
Analysis of the character and condition of each river style in Bega catchment, and their downstream patterns, are used to
provide a biophysical basis to prioritorize river management strategies. These reach-scale strategies are prioritorized within
an integrative catchment framework. Conserving near-intact sections of the catchment is the first priority. Second, those
parts of the catchment that have natural recovery potential are targeted. Finally, rehabilitation priorities are considered
for highly degraded reaches. At these sites, erosion and sedimentation problems may reflect irreversible changes to river
structure. 相似文献
940.
/ The Itapiranga Sustainable Logging Plan provides an example of how Brazil's licensing system functions for logging companies in the state of Amazonas. Two questions need to be dealt with: "How sustainable can logging in the Amazon be?" and "What and how effective are existing legal mechanisms to deal with logging projects?" The environmental impact assessment (EIA) and environmental impact statement (EIS, known as the RIMA in Brazil), present relatively detailed accounts of biodiversity and the need to adopt conservation strategies to protect it. However, social and health impacts are only superficially addressed. The economic sustainability of the operation over multiple cycles is not demonstrated. The multidisciplinary teams responsible for the EIA and EIS (RIMA) reports are hired by the project proponent, an arrangement inherently carrying the risk of biasing the result. Logging reduces biodiversity, releases greenhouse gases and inflicts social and health costs. These impacts reduce the ability of Amazonian forests to provide environmental services and to supply food and livelihood security to local populations. The reports inflate positive effects such as employment: the estimated number of jobs was cut by more than half in a revision made after the EIA and EIS (RIMA) had been approved. Not only do the reports need to be more realistic in assessing both positive and negative consequences of proposed projects, but better means are needed to ensure that promised mitigatory measures are enforced in practice. Many of the lessons that can be drawn from the Itapiranga Plan are not unique to logging projects and apply to licensing of development activites generally in Brazil and elsewhere. 相似文献