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   2160篇
  免费   164篇
  国内免费   62篇
安全科学   43篇
废物处理   31篇
环保管理   983篇
综合类   501篇
基础理论   303篇
环境理论   44篇
污染及防治   99篇
评价与监测   56篇
社会与环境   233篇
灾害及防治   93篇
  2024年   7篇
  2023年   38篇
  2022年   24篇
  2021年   59篇
  2020年   62篇
  2019年   96篇
  2018年   84篇
  2017年   157篇
  2016年   116篇
  2015年   90篇
  2014年   72篇
  2013年   142篇
  2012年   92篇
  2011年   125篇
  2010年   65篇
  2009年   119篇
  2008年   102篇
  2007年   83篇
  2006年   90篇
  2005年   79篇
  2004年   62篇
  2003年   58篇
  2002年   70篇
  2001年   57篇
  2000年   62篇
  1999年   48篇
  1998年   34篇
  1997年   30篇
  1996年   28篇
  1995年   35篇
  1994年   23篇
  1993年   23篇
  1992年   16篇
  1991年   10篇
  1990年   15篇
  1989年   12篇
  1988年   7篇
  1987年   10篇
  1986年   9篇
  1985年   19篇
  1984年   9篇
  1983年   9篇
  1982年   6篇
  1981年   6篇
  1980年   3篇
  1979年   4篇
  1978年   4篇
  1977年   5篇
  1972年   2篇
  1971年   3篇
排序方式: 共有2386条查询结果,搜索用时 203 毫秒
101.
Employing in-depth, elite interviews, this empirical research contributes to understanding the dynamics among policy windows, policy change, and organizational learning. First, although much of the research on agenda setting—how issues attract enough attention that action is taken to address them—has been conducted at the national scale, this work explores the subnational, regional scale. With decentralization, regional-scale environmental decision-making has become increasingly important. Second, this research highlights the role of policy windows and instances of related organizational learning identified by natural resources managers. Having practitioners identify focusing events contrasts with the more typical approach of the researcher identifying a particular focusing event or events to investigate. A focusing event is a sudden, exceptional experience that, because of how it leads to harm or exposes the prospect for great devastation, is perceived as the impetus for policy change.  相似文献   
102.
阐述了造成农产品污染的原因,进而提出发展有机农业的必要性,及国内外有机农业发展的现状和趋势,指出沈阳市发展有机农业的优势所在。  相似文献   
103.
本文首次以上海市“十四五”规划的视角,使用系统动力学方法研究上海市的绿色发展因素。首先确定了由经济、社会、环境、资源四个子系统交叉融合而构成上海市绿色发展系统,再基于系统动力学原理和上海市2012—2019年的数据构建上海市绿色发展模型,响应“十四五”规划在绿色发展方面设立的目标,构建多个未来发展情景并进行指标参数调控,依据各个情景的仿真结果,分析并总结了“十四五”规划背景下上海市的绿色发展特点。研究结果表明,影响绿色发展的关键因素由主到次依次为生态环境建设支出、研发支出、产业结构调整。相比于产业的投资结构调整,上海市对从业人员结构的调整可以高效平衡经济与环境的发展;加快科技创新可以在很大程度上抑制碳排放,从而快速实现上海市的“双碳”目标;针对化学污染物的治理,污染源防治不但十分有效,而且有利于持续性发展,这些措施应是上海市政府的首选。  相似文献   
104.
ABSTRACT

How have petroleum and power companies and their European industry associations responded to the EU emissions trading system (ETS)? Responses can be political, directed externally towards the initiation and reforms of the EU ETS itself, or internally and market-based, directed at low-carbon solutions. Proactive response strategies shape companies’ leadership potential. Variation in responses is explained by two models that differ in assumptions about corporate behaviour as well as the wider multilevel regulatory context in which companies operate. Responses are found to have converged within the two industries, with reactive companies following the proactive ones. Secondly, responses between the two industries increasingly diverge, with the power industry becoming much more proactive than the petroleum industry. The main explanation is found in the differing relevance of the two models and the wider regulatory context, particularly differing exposure to international competition and weak international climate agreements.  相似文献   
105.
ABSTRACT

This paper assesses the evolution of generation technology-mix in Australia, with specific emphasis on understanding how such evolution has been shaped by wider political and socio-economic influences. This assessment is predicated on the argument that the contemporary, quintessentially techno-economic, policy discourse on renewable energy is deficient, as it ignores climacteric political and socio-economic influences on generation technology-mix. The methodological framework employed in this paper is informed by the core tenets of technological change theory. The assessment suggests that generation technology-mix in Australia has historically been overwhelmingly influenced by the underlying technological paradigm of the electricity industry; and that this technological paradigm essentially draws its imprimatur from the wider political and socio-economic contexts. By implication, it suggests that a rapid uptake of renewables will have widespread ramifications, extending into political, socio-economic and cultural realms of a society. Clearly, existing policy discourse – that tends to focus on technical potentials, cost competitiveness, externalities and risks of various renewable technologies – is deficient. A much broader discourse is needed. This paper also made an attempt to develop a basis for such a discourse by reviewing broader aspects of the Australian society that would be affected by a rapid uptake of renewables.  相似文献   
106.
基于协整和因果分析的我国安全生产宏观政策干预研究   总被引:1,自引:1,他引:0  
为进一步分析我国安全生产政策的实施效果及存在问题,根据政策时效干预度量化模型,采用协检验、格兰杰因果检验和脉冲响应分析等计量方法对1978-2006年我国特别重大事故发生趋势与政策时效干预力度关系进行量化分析,得出特别重人事故的发生与政策时效干预力度问存在长期均衡关系,且在10%的显著水平下,特别重大事故的发生是政策时效干预力度加强的格兰杰原因.同时分析表明,目前我国安全生产政策干预表现出两大缺点:被动性和滞后性.因此,应逐步开展生产安全事故宏观预警与政策模拟等研究,为提高安全生产宏观政策干预的主动性和前瞻性提供技术支持.  相似文献   
107.
面向可持续发展的国家投资策略   总被引:4,自引:1,他引:4  
可持续发展战略逼迫投资创新,呼唤着新的国家投资策略。本文分析了可持续发展与投资创新的关系,系统地研究了可持续发展的投资策略,讨论了可持续发展的投资结构问题,有针对性地提出了可持续发展的投资政策建议。  相似文献   
108.
南京市经济发展与环境污染关系的实证研究   总被引:22,自引:5,他引:22  
根据南京市1991~2003年经济与环境数据,分析经济发展与环境污染的相互关系,建立了南京市经济增长与环境污染水平的计量模型,进而评价了南京市的环境保护政策。研究表明:作为一个重化工业城市,南京市自20世纪90年代以来,在经济高速发展的情况下,其环境恶化程度逐步得到遏制,部分环境指标与人均GDP演替轨迹呈现显著的环境库兹涅茨曲线特征。这主要归功于南京市政府近年来有效的环境政策和巨额的环境投资。  相似文献   
109.
Due to the favorable weather, abundant water resources and fertile soil, the area has been known as the homeland for crops and fish. However, being one of the most developed regions in China, the environmental quality of the Pearl River delta has deteriorated due to recent socio-economic changes during the past two decades. The drivers are industrialization and economic growth, population growth and agricultural development; and the pressures are water pollution which include nutrients and suspended solids, pesticides, other persistent toxic substances (PAHs and PCBs) and oil. These have imposed various impacts such as eutrophication, formation of red tides and biomagnification of organic contaminants through food chains. In response to these, regulatory measures have been established by the Environmental Protection Bureau of Guangdong Province, joining forces with environmental protection authorities in all urban cities and most counties, in addition to the Hong Kong Environmental Protection Department, to control pollution in order to prevent further environmental deterioration and economic loss. The present paper is an attempt by following the DPSIR approach promoted by the OECD in the early 1990s and further developed by IGBP LOICZ to review the environmental quality of Pearl River with emphasis on water quality and the impact of rapid socio-economic changes.  相似文献   
110.
西部生态环境脆弱而屏障作用显著.在新一轮西部大开发的背景下,对过去西部地区生态环境保护与管理政策进行回顾和总结,辨析其实施成效与存在的问题,并进一步提出相关政策建议,对今后西部国土开发和生态环境保护具有重要意义.本文通过对我国西部生态环境政策进行梳理和分析,发现:①西部地区的生态环境政策在不同阶段具有不同特征,改革开放以前(1949-1977年)主要是开发带动治理,改革开放-西部大开发之前(1978-1999年)逐渐由开发转变为以保护为主,西部大开发十年期间(2000-2010年)开始全面实施生态环境保护和建设;②在空间上,通过自然保护区设置、生态移民、财政转移支付和差别化的生态环境政策,在一定程度上促进了生态、社会、经济的协调发展;③在各项政策和工程实施下,西部生态环境退化趋势得到明显缓解,同时,农牧民的生活条件和经济收入得到较大提高,在生态环境治理、全社会参与、环保投资等方面探索出诸多成功经验;④生态环境政策还存在一些亟待解决的问题,如生态环境建设多以各个部门主导,缺乏统一规划和政策协调,有些政策缺乏充足的科学依据,生态补偿政策缺乏总体还需进一步完善,环境政策实施效果评估,反馈环节还较薄弱等.针对这些问题,本文最后提出建议.  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