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   1948篇
  免费   166篇
  国内免费   50篇
安全科学   51篇
废物处理   26篇
环保管理   909篇
综合类   451篇
基础理论   290篇
环境理论   44篇
污染及防治   50篇
评价与监测   34篇
社会与环境   238篇
灾害及防治   71篇
  2024年   7篇
  2023年   35篇
  2022年   26篇
  2021年   49篇
  2020年   57篇
  2019年   93篇
  2018年   79篇
  2017年   153篇
  2016年   116篇
  2015年   89篇
  2014年   69篇
  2013年   121篇
  2012年   88篇
  2011年   110篇
  2010年   58篇
  2009年   98篇
  2008年   82篇
  2007年   72篇
  2006年   80篇
  2005年   76篇
  2004年   53篇
  2003年   47篇
  2002年   61篇
  2001年   54篇
  2000年   60篇
  1999年   45篇
  1998年   31篇
  1997年   26篇
  1996年   25篇
  1995年   31篇
  1994年   18篇
  1993年   19篇
  1992年   13篇
  1991年   8篇
  1990年   14篇
  1989年   9篇
  1988年   7篇
  1987年   7篇
  1986年   9篇
  1985年   17篇
  1984年   8篇
  1983年   9篇
  1982年   6篇
  1981年   5篇
  1979年   4篇
  1978年   4篇
  1977年   5篇
  1973年   2篇
  1972年   2篇
  1971年   3篇
排序方式: 共有2164条查询结果,搜索用时 15 毫秒
991.
环境管制政策的局限性与变革--自愿性环境政策的兴起   总被引:8,自引:0,他引:8  
我国虽然基本上避免了环境质量急剧恶化的局面。但是现行环境政策并没有从根本上遏制环境状况不断恶化的趋势,我国环境政策的效率亟待摄高。究其原因,我国环境政策以行政直控的管制政策为主。具有强烈的行政管理色彩,使得政府和企业的博弈长期锁定在非合作状态。要摆脱这种困境,必须引入第三方激励、监督机制。促使双方的博弈转变为合作博弈。20世纪90年代中期自愿性环境政策的渐渐兴起,是企业和公众在产品市场上互相影响的结果。而政府起到引导激励、信号传递作用。文章从博弈论的角度对此进行了分析,自愿性环境政策缓解了环境管制成本与效果冲突的困境,是未来环境政策的一个重要的方向。  相似文献   
992.
推动沿海海洋经济集成创新发展的思考   总被引:6,自引:0,他引:6  
沿海海洋经济发展集成创新之路的选择和实施,首先要树立创新发展的理念。科学认识外部环境变化并作出有效的符合实际的战略决策。其次要遵循海洋经济发展的客观规律体系的综合调节。强化海洋经济倒新发展的合力、动态协调以及可持续。实现各项创新要素的全方位优化、合理搭配和有效协同;还要加强集成管理。形成综合协调机制。以提高海洋经济系统的、综合的、有效的倒新能力和竞争能力。从而促进海洋经济发展上新台阶。  相似文献   
993.
994.
Abstract: Threats to native forests from non‐native insects and pathogens (pests) are generally addressed with methods such as quarantine, eradication, biological control, and development of resistant stock through hybridization and breeding. In conjunction with such efforts, it may be useful to have citizen scientists locate rare surviving trees that may be naturally pest resistant or tolerant. The degree of resistance of individual trees identified in this way can be tested under controlled conditions, and the most resistant individuals can be integrated into plant breeding programs aimed at developing pest‐resistant native stock. Involving citizen scientists in programs aimed at identifying rare trees that survive colonization by pests provides a low‐cost means of maximizing search efforts across wide geographic regions and may provide an effective supplement to existing management approaches.  相似文献   
995.
Abstract: Tradable permits have been applied in many areas of environmental policy and may be a response to increasing calls for flexible conservation instruments that successfully conserve biodiversity while allowing for economic development. The idea behind applying tradable permits to conservation is that developers wishing to turn land to economic purposes, thereby destroying valuable habitat, may only do so if they submit a permit to the conservation agency showing that habitat of at least the equivalent ecological value is restored elsewhere. The developer himself does not need to carry out the restoration, but may buy a permit from a third party, thus allowing a market to emerge. Nevertheless, the application of tradable permits to biodiversity conservation is a complex issue because destroyed and restored habitats are likely to differ. There may be various trade‐offs between the ecological requirements that destroyed and restored habitats be as similar as possible, and the need for a certain level of market activity to have a functioning trading system. The success of tradable permits as an instrument for reconciling the conflicts between economic development and conservation depends on the existence of certain economic, institutional, and ecological preconditions, for example, a functioning institutional framework, sufficient expert knowledge, and adequate monitoring and enforcement mechanisms.  相似文献   
996.
Floods are among the world's most devastating natural disasters, causing immense damage and accounting for a large number of deaths world-wide. Good flood management policies play an extremely important role in preventing floods. It is well known that China has more than 5000 years of experience in flood management policy beginning with the reign of DaYu and Gun. Although culturally related, Japanese flood management developed differently from that of China. Under rapid development of civil engineering technology, flood management was achieved primarily through the construction of dams, levees and other structures. These structures were never adequate to stop all floods, and recent climate change driven extreme events are ever more frequently overwhelming such infrastructure. It is important to take a historical perspective of Japanese and Chinese flood management in order to better manage increasingly frequent extreme events and climate change. We present insights taken from an historical overview of Japanese and Chinese flood management policies in order to guide future flood risk management policy.  相似文献   
997.
铅锌矿是我国优势矿产资源,长期以来由于我国经济发展落后,对其开发治理均处于较低层次,消耗严重。本文在综合分析我国铅锌矿资源特点、开发治理现状以及存在问题的基础上,以陕西省白河县卡子镇铅锌矿资源为例,探讨了适合我国国情的铅锌矿资源开发治理新模式,并以政策论证的方法提出了相关政策建议,以为当地乃至整个国家矿业资源的可持续发展提供借鉴。  相似文献   
998.
Abstract:  The role of agricultural landscapes in biodiversity conservation has been largely ignored despite their potential role in conserving declining species. Within agricultural landscapes, set-aside programs may offer the most promising conservation opportunities due to the large area involved in these programs. I explored the relationship between set-aside effect size—on the basis of data from field studies of birds in cropland and set-aside fields—and population changes following establishment of these fields. Species whose abundance was most strongly influenced by the establishment of set-aside lands also tended to show positive changes in population trends following broad-scale implementation of the set-aside program. This relationship was strongest for grassland obligate birds, a group of birds experiencing broad-scale population declines throughout North America. There is now increasing evidence that set-aside lands within the United States are providing population-level benefits to grassland birds. Nevertheless, there are also increasing concerns about the stability of these set-aside lands in the face of increased demand for crops and rising commodity prices. If set-aside area within the United States is allowed to decline, additional declines of birds and perhaps other taxa within agricultural landscapes seem likely.  相似文献   
999.
环境库兹涅茨曲线的虚幻性及其对可持续发展的现实影响   总被引:11,自引:1,他引:10  
生态环境质量真的能够随着经济发展而改善吗?“先污染、后治理”真的是普遍的发展规律吗?既有的理论一般认为.随着经济的发展.生态环境的质量在经过一个时期的恶化之后,将在一定的发展阶段出现好转.其变化过程呈“倒U曲线”状态.这就是环境Kuznets曲线。作者认为这是一个貌似真实的虚幻.生态环境随着经济发展而好转只可能是局部的、而不可能是整体性的.经济发展与生态维护的双赢目标也同样是难以企及的,经济发展与生态维护只能是基于各种利益关系的权衡。文章还对中国长期推行的几种宏观经济政策的生态环境影响进行了分析,并提出了经济利益与生态利益相权衡的现实主张。  相似文献   
1000.
环境经济政策是宏现经济政策的重要组成部分,本文首先阐述了制定环境经济政策的必要性和环境经济政策的功能,然后分析了环境经济政策体系的组成,最后对我国的环境经济政策进行了初步探讨。  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