全文获取类型
收费全文 | 11839篇 |
免费 | 43篇 |
国内免费 | 25篇 |
专业分类
安全科学 | 95篇 |
废物处理 | 857篇 |
环保管理 | 1581篇 |
综合类 | 1303篇 |
基础理论 | 3585篇 |
环境理论 | 4篇 |
污染及防治 | 2320篇 |
评价与监测 | 1156篇 |
社会与环境 | 994篇 |
灾害及防治 | 12篇 |
出版年
2023年 | 23篇 |
2022年 | 28篇 |
2021年 | 41篇 |
2020年 | 34篇 |
2019年 | 34篇 |
2018年 | 1501篇 |
2017年 | 1411篇 |
2016年 | 1237篇 |
2015年 | 184篇 |
2014年 | 90篇 |
2013年 | 189篇 |
2012年 | 543篇 |
2011年 | 1464篇 |
2010年 | 783篇 |
2009年 | 706篇 |
2008年 | 980篇 |
2007年 | 1340篇 |
2006年 | 125篇 |
2005年 | 115篇 |
2004年 | 128篇 |
2003年 | 154篇 |
2002年 | 188篇 |
2001年 | 52篇 |
2000年 | 47篇 |
1999年 | 23篇 |
1998年 | 35篇 |
1997年 | 28篇 |
1996年 | 22篇 |
1995年 | 33篇 |
1994年 | 32篇 |
1993年 | 15篇 |
1992年 | 21篇 |
1991年 | 16篇 |
1990年 | 13篇 |
1989年 | 14篇 |
1988年 | 19篇 |
1987年 | 16篇 |
1986年 | 17篇 |
1984年 | 19篇 |
1983年 | 25篇 |
1982年 | 15篇 |
1981年 | 13篇 |
1980年 | 8篇 |
1979年 | 10篇 |
1978年 | 7篇 |
1977年 | 7篇 |
1976年 | 7篇 |
1974年 | 6篇 |
1955年 | 8篇 |
1954年 | 8篇 |
排序方式: 共有10000条查询结果,搜索用时 31 毫秒
51.
Aysen Müezzinoğlu Tolga Elbir Abdurrahman Bayram 《Environmental Engineering and Policy》1998,1(2):109-116
In this study, an inventory of air pollutant emission estimates from major air polluting sources in Turkey for period between 1985 and 2005 with 5-year intervals were estimated. Inventory covers anthropogenic sources of five major air pollutants of particulate matter, sulfur dioxide, carbon monoxide, nitrogen oxides and non-methane volatile organic compounds. Their break-down with respect to main activity sectors were shown and their distribution by the largest industrial source categories were worked out as annual estimates. This inventory and its analysis point to serious environmental implications of air pollutants and a need to develop a policy plan for reducing these emissions. 相似文献
52.
53.
54.
Helmut Haberl Christoph Plutzar Karl-Heinz Erb Veronika Gaube Martin Pollheimer Niels B. Schulz 《Agriculture, ecosystems & environment》2005,110(3-4):119-131
The relationship between land-use induced changes in production ecology and avifauna diversity was analysed using a GIS land cover dataset on a 0.25 km × 0.25 km grid covering Austria's national territory. Considering only aboveground processes, the “human appropriation of net primary production” (HANPP = potential NPP − NPPt), actual NPP (NPPact), harvest (NPPh) and NPPt (= NPPact − harvest) were recalculated based on existing datasets. Elevation as well as indicators of land cover heterogeneity and landscape heterogeneity were also considered. Correlation analyses were performed between these potential determinants of avifauna diversity and breeding bird species richness data as well as the percentage of endangered breeding birds included in the Austrian red list. Four spatial scales—0.25 km × 0.25 km, 1 km × 1 km, 4 km × 4 km and 16 × 16 km, were analysed. It was shown that breeding bird species richness was more strongly correlated with production ecological indicators and elevation than with heterogeneity indicators. A residual analysis in which the effect of elevation (a proxy for climate) on species richness and its potential determinants was removed confirmed the importance of the availability of trophic energy (NPP) for bird diversity patterns. The results support the species-energy hypothesis, thus confirming the notion that HANPP could be a useful pressure indicator for biodiversity loss. 相似文献
55.
Independent teams undertook environmental monitoring of particular concentrations of major construction projects forming part of Hong Kong’s U.S. $20 billion airport infrastructure programme located in dense urban areas. The team combination of environmental specialists with experienced civil engineers enabled pragmatic mitigation measures to be developed and accepted by the construction personnel with the result that potentially significant adverse impacts were averted. The authors discuss the mechanism and success of this innovative approach. 相似文献
56.
57.
58.
59.
60.