全文获取类型
收费全文 | 44982篇 |
免费 | 1316篇 |
国内免费 | 1645篇 |
专业分类
安全科学 | 7985篇 |
废物处理 | 413篇 |
环保管理 | 9071篇 |
综合类 | 23686篇 |
基础理论 | 2066篇 |
污染及防治 | 962篇 |
评价与监测 | 1265篇 |
社会与环境 | 1743篇 |
灾害及防治 | 752篇 |
出版年
2024年 | 150篇 |
2023年 | 520篇 |
2022年 | 577篇 |
2021年 | 799篇 |
2020年 | 612篇 |
2019年 | 716篇 |
2018年 | 499篇 |
2017年 | 613篇 |
2016年 | 922篇 |
2015年 | 1256篇 |
2014年 | 3234篇 |
2013年 | 2184篇 |
2012年 | 2715篇 |
2011年 | 2560篇 |
2010年 | 2148篇 |
2009年 | 2262篇 |
2008年 | 2634篇 |
2007年 | 2378篇 |
2006年 | 1975篇 |
2005年 | 2247篇 |
2004年 | 2454篇 |
2003年 | 2463篇 |
2002年 | 2035篇 |
2001年 | 1654篇 |
2000年 | 1404篇 |
1999年 | 1064篇 |
1998年 | 985篇 |
1997年 | 841篇 |
1996年 | 818篇 |
1995年 | 749篇 |
1994年 | 531篇 |
1993年 | 379篇 |
1992年 | 383篇 |
1991年 | 328篇 |
1990年 | 366篇 |
1989年 | 467篇 |
1988年 | 8篇 |
1987年 | 8篇 |
1986年 | 4篇 |
1979年 | 1篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
131.
132.
河北省近日对节能减排“双三十”单位又多了一项考核指标,规定从今年起,将烟(粉)尘考核结果一并纳入省对“双三十”单位领导干部政绩和企业负责人业绩的评价考核。考核内容主要包括:“双三十”单位确定的烟(粉)尘排放达标和空气环境质量达标改善情况;烟(粉)尘减排工程和措施的落实情况;烟(粉)尘污染年度减排方案制定实施情况等。 相似文献
133.
林飞 《中国个体防护装备》2007,(2):18
巴固-德洛(中国)安全防护设备有限公司最近向清华大学公共安全研究中心捐赠了价值30余万元人民币的个体防护装备、器材,用于该中心的教学及科研工作。 相似文献
135.
136.
137.
根据环境意识结构.设计了旅游管理部门环境意识调查问卷。其主要的指标体系包括:旅游环境知识水平、旅游环境态度、旅游环境评价和旅游环境行为四个方面。对指标体系各部分之间以及每一指标部分的每一题目之间的相对重要性进行权重的确定.而且对各部分的每道题目的各个选项予以赋分。基于权重和赋分.结合调查问卷的实际情况,设计了指标体系各部分评价模型和环境意识总体评价模型。以此来计算草原旅游发展中旅游管理部门环境意识水平的综合得分。经过分析得知,旅游管理部门环境意识模式是“环境知识制约型”模式。 相似文献
138.
139.
Walter R Stahel 《中国人口.资源与环境(英文版)》2007,5(4):3-19
From an economic point of view, the industrial economy is efficient to overcome situations of a scarcity of goods. From a technological point of view, the resource efficiency of the manufacturing processes of the industrial economy has been permanently improved during the last 200 years. In addition, cleaner processes have been developed. However, from an ecologic point of view, an increasing world population with increasing consumption has produced a "global footprint" which approaches the carrying capacity of the planet. A circular economy and its high-value spin-offs-a lake economy and a performance or functional service economy-can fulfil customers' needs with considerably less resource consumption, less environmental impairment in production and considerably less end-of-life product waste, especially in situations of affluence, when a considerable stock of physical goods and infrastructures exists. Also, in situations of a scarcity of natural resources, both energy and materials, often characterised by rapidly rising resource prices, the economic actors of a circular economy have a high competitive advantage over the actors of the industrial economy, due to much lower procurement costs for materials and energy. From a social point of view, a circular economy increases the number of skilled jobs in regional enterprises. However, the shift from a linear manufacturing economy to a circular or service economy means a change in economic thinking from flow (throughput) management to stock (asset) management: in a manufacturing economy with largely unsaturated markets, total wealth increases through accumulation as resource throughput (flow) is transformed into a higher stock of goods of better quality (but in a manufacturing economy with largely saturated markets, wealth represented by the stock of goods will no longer increase); in a circular or service economy, total wealth increases through a smart management of existing physical assets (stock) that are adapted to changes in both technology and customer demand. This second approach not only applies to physical capital but equally to social capital, such as health and education and green GDP. To measure the social wealth of a population, it is not the amount of money spent on schools and hospitals that matters, butif this expenditure has led to a better education of the students, and a better health of the people. 相似文献