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   2813篇
  免费   174篇
  国内免费   98篇
安全科学   95篇
废物处理   39篇
环保管理   1127篇
综合类   726篇
基础理论   355篇
环境理论   44篇
污染及防治   207篇
评价与监测   119篇
社会与环境   267篇
灾害及防治   106篇
  2024年   10篇
  2023年   54篇
  2022年   50篇
  2021年   79篇
  2020年   89篇
  2019年   111篇
  2018年   94篇
  2017年   172篇
  2016年   149篇
  2015年   103篇
  2014年   103篇
  2013年   151篇
  2012年   124篇
  2011年   191篇
  2010年   87篇
  2009年   161篇
  2008年   156篇
  2007年   116篇
  2006年   124篇
  2005年   95篇
  2004年   83篇
  2003年   74篇
  2002年   84篇
  2001年   72篇
  2000年   80篇
  1999年   67篇
  1998年   42篇
  1997年   44篇
  1996年   37篇
  1995年   42篇
  1994年   33篇
  1993年   21篇
  1992年   20篇
  1991年   12篇
  1990年   15篇
  1989年   11篇
  1988年   10篇
  1987年   11篇
  1986年   16篇
  1985年   23篇
  1984年   12篇
  1983年   13篇
  1982年   9篇
  1981年   5篇
  1980年   3篇
  1979年   6篇
  1978年   4篇
  1977年   6篇
  1973年   4篇
  1971年   3篇
排序方式: 共有3085条查询结果,搜索用时 15 毫秒
891.
山西是中国环境污染最为严重的省区之一,经济发展与环境保护的矛盾非常突出.开展排污权有偿使用和交易,是山西省创新环保机制体制、服务经济社会发展的迫切需要.2010年,山西省获批成为国家排污权交易试点省份之一.概括总结了山西省排污权交易的实践及存在问题,提出今后要在合理核定和分配初始排污权、积极创新排污权质押与租赁机制、加强排污量监测核定等方面积极开展工作体制机制创新,把试点工作推向深入的政策建议.  相似文献   
892.
This paper aims to assess the renewable energy capacity of Turkey in order to consider main priorities in the energy policy of Turkey. In this paper, renewable energy potential and regulatory conditions are discussed in Turkey in comparison with European Union. The results of the study implemented within the framework of EnviroGRIDS project indicated a promising yet very susceptible future for the implementation of renewable energy power plants in Turkey. The forecasts have shown that the solar power potential utilization is becoming more significant after 2020. The projections for 2050 indicate that electricity consumption from small and medium renewable energy sources including solar and wind will constitute 15% of the total, whereas the solar thermal will constitute around 16%. Geothermal and other renewables will remain around 3%. According to the high demand scenario, in 2050 the share of hydropower in overall electricity generation will be 12%, followed by solar power at 7% and wind power at 3%. Additionally, renewable energy policy and regulations in Turkey and in EU are overviewed in this study. On the contrary to EU, the constant feed-in tariff amount does not consider capital investments of specific energy sources in Turkey that brings disadvantage to the implementation. However, new regulations published and currently applied should be accepted as milestones in acquisition period of Turkey in EU.  相似文献   
893.
人工湿地在雨水处理与湖泊水质改善中的应用研究   总被引:4,自引:0,他引:4  
湖泊是城市生态系统重要组成部分,对城市的生态化建设具有特殊的意义。但近年来我国城市湖泊污染严重,水质堪忧。面对城市人工湖泊的水质恶化,水资源短缺等问题,我们对雨水、微污染湖泊进行了研究,结果表明雨水是一种可以利用的资源。文中介绍了雨水利用的重要性、城市雨水污染现状及城市雨水的处理与利用方法和人工湿地净化雨水补充湖水、改善湖水水质的系统设计及湿地植物选择与景观配置。  相似文献   
894.
Extensive green areas generate a recognizable green identity of Ljubljana. Due to the challenges of climate change and urbanization the city's spatial policy highlights revitalization of degraded urban areas, preserving the quality and scope of the existing green network and the protection of multifunctional natural areas surrounding the city. Article describes the project of Rakova Jelša Park as a good example of these policies. With an NGO initiative a former degraded area with illegal dumping and non-indigenous vegetation was transformed into recreational park with increased biocultural diversity. Important lesson of the project is that opening up space for public use not only prevents degradation, but also improves the quality of urban ecosystems. One of the challenges for the city's future sustainable ecosystem development will be a more active cooperation with its citizens in the green infrastructure policy and later also a partial transfer of responsibility for green areas to them.  相似文献   
895.
Enhancing agro-ecosystem sustainability raises difficult challenges for environmental policy: it requires both increasing knowledge on these complex systems to design effective solutions and coordinating stakeholders with diverging interests. However, most existing environmental policies consider ecosystems’ desirable properties as given, leading ecosystem managers to favor “turnkey” solutions. How could public policy better support local collective initiatives aiming at reconciling agriculture and the environment? This paper presents an empirical case study from western France, in which a partnership between an agricultural cooperative and an ecological research center resulted in a collective design initiative. We conceptually model this initiative drawing upon recent design theories and Georgescu-Roegen’s ‘fund-flow’ model, defining ‘ecological funds’ as the starting point of a collective design process. The results highlight the importance of developing policy instruments that can better support local innovation processes through greater democratization. Adopting a design approach to sustainable agricultural landscape management could be particularly fruitful in situations where collective action is necessary but where there is no common good recognized as such, and no existing community identified.  相似文献   
896.
In the context of urban flood management, resilience is equal to resisting, recovering, reflecting and responding. The variety of causes of flooding and their consequences underpin the need for increased and internationally coordinated efforts to enhance technologies and policies for dealing with floods. This paper addresses this issue and presents some novel research ideas related to resilience to flooding in urban areas, which are under development within the EU FP7 project ‘Collaborative research on flood resilience in urban areas’ (CORFU). The approach adopted in this project aims to quantify the cost-effectiveness of resilience measures and integrative and adaptable flood management plans for different scenarios of relevant drivers: urban development, socio-economic trends and climate changes. It is believed that the way in which the different models are being put together, combined with the variability of conditions in case study areas in Asia and in Europe, will ultimately enable more scientifically sound policies for the management of the consequences of urban flooding.  相似文献   
897.
美国在全球环保产业中占据着十分重要的位置。美国环保产业的蓬勃发展,得益于其行之有效的产业政策与激励措施,其环保产业政策的发展对很多国家都产生了重要影响。介绍了美国环保产业的范围和发展现状,从环境管控、环保技术、产业化、财税支持和环保贸易等方面分析了美国环保产业政策框架。最后,结合美国环保产业发展的经验与教训对我国未来环保产业的发展提出了政策建议。  相似文献   
898.
近年来高速铁路发展迅猛,与此同时高铁对沿线环境的影响及生态破坏已成为社会关注的热点问题,并引起国家及地方政府的高度重视.以沪宁城际高速铁路为研究案例,首先分析了高速铁路建设对沿线自然及生态环境影响的调查内容、方法和过程,然后论述了铁路噪声、振动电磁辐射、污水及固体废弃物对沿线环境的影响,并论述各类污染的生态防护措施.在此基础上,对沪宁城际铁路环保经验进行了总结归纳,最后提炼形成中国高速铁路建设发展的环保策略建议.  相似文献   
899.
救荒是明代经济发展、社会稳定的重要措施。为了保证荒政的顺利而有效地进行,明太祖从灾害防治到灾害赈济,从赈灾官员的选用到对吏治腐败的整治,都制定了较为详细的法律条文。从这些法律条文中可以概括出明太祖的荒政立法包含以下两个方面:一、防灾与减灾中的立法;二、救灾中的立法。朱元璋通过荒政立法,一方面惩治了救灾中的腐败,提高了救灾的效率;另一方面也使灾民在自然灾害面前得到国家的救济,使社会生产力的破坏得以减轻,为明王朝的经济恢复和发展奠定了基础。  相似文献   
900.
围绕煤炭资源开发中的生态环境问题,中国相继出台了一些资源生态环境补偿政策,建立起包括资源税费制度、环境影响评价制度、环境恢复治理保证金制度、三同时制度、排污收费制度在内的一些生态环境补偿法律制度,但现有的煤炭资源开发生态补偿制度存在法律体系和政策设计不完备,缺乏利益相关者的充分参与,部门化利益倾向,政策手段较为单一,生态补偿资金没有来源保障,缺乏统一的补偿标准等问题。为此,要不断健全生态补偿法律法规体系,将矿区开发的生态环境补偿纳入到法制化和市场化轨道,完善煤炭资源税费制度,建立健全公众参与机制,实现矿区的可持续发展。  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