全文获取类型
收费全文 | 725篇 |
免费 | 10篇 |
国内免费 | 6篇 |
专业分类
安全科学 | 33篇 |
废物处理 | 20篇 |
环保管理 | 174篇 |
综合类 | 66篇 |
基础理论 | 214篇 |
环境理论 | 1篇 |
污染及防治 | 113篇 |
评价与监测 | 60篇 |
社会与环境 | 48篇 |
灾害及防治 | 12篇 |
出版年
2022年 | 4篇 |
2021年 | 3篇 |
2020年 | 7篇 |
2019年 | 8篇 |
2018年 | 19篇 |
2017年 | 13篇 |
2016年 | 25篇 |
2015年 | 12篇 |
2014年 | 18篇 |
2013年 | 37篇 |
2012年 | 24篇 |
2011年 | 44篇 |
2010年 | 23篇 |
2009年 | 37篇 |
2008年 | 35篇 |
2007年 | 32篇 |
2006年 | 31篇 |
2005年 | 27篇 |
2004年 | 20篇 |
2003年 | 21篇 |
2002年 | 28篇 |
2001年 | 17篇 |
2000年 | 23篇 |
1999年 | 14篇 |
1998年 | 13篇 |
1997年 | 9篇 |
1996年 | 14篇 |
1995年 | 18篇 |
1994年 | 16篇 |
1993年 | 13篇 |
1992年 | 9篇 |
1991年 | 7篇 |
1990年 | 10篇 |
1989年 | 6篇 |
1988年 | 11篇 |
1987年 | 7篇 |
1985年 | 11篇 |
1984年 | 9篇 |
1983年 | 14篇 |
1982年 | 8篇 |
1981年 | 5篇 |
1980年 | 4篇 |
1979年 | 8篇 |
1977年 | 3篇 |
1976年 | 2篇 |
1975年 | 3篇 |
1974年 | 3篇 |
1972年 | 4篇 |
1968年 | 2篇 |
1967年 | 2篇 |
排序方式: 共有741条查询结果,搜索用时 62 毫秒
41.
Paige Brown Jarreau Amy Reynolds 《Environmental Communication: A Journal of Nature and Culture》2017,11(2):143-165
This mixed-method case study of environmental communication best practices in Louisiana, USA, identifies trends and approaches as informed by environmental psychology. The results provide key insights for environmental communicators, especially communicators in coastal regions. In-depth interviews with both environmental psychologists and environmental communicators showed that both groups emphasized knowing the audience, telling local stories, building relationships with target audiences and targeted messaging. Both psychologists and communicators also frequently mentioned general messaging concerns of source credibility, avoiding controversial terms and talking about issues, impacts and solutions to which the target audience can relate. A representative survey revealed that Louisiana residents are most interested in hearing about how environmental issues such as climate change, coastal land loss and flooding are affecting their own communities. This finding supports the idea that environmental communicators could do a better job tapping into strong place attachment and sense of community among coastal residents to promote action. 相似文献
42.
S.Y. Szeto J.R. Mackenzie M.J. Brown 《Journal of environmental science and health. Part. B》2013,48(2):225-235
Abstract Foliar sprays of dimethoate at 150 or 300 g a.i./ha, methamidophos at 450 or 900 g a.i./ha and pirimicarb at 140 or 280 g a.i./ha were applied for control of the green peach aphid, Myzus pericae (Sulzer), and the lettuce aphid, Nasonovia ribisnigri (Mosley), about 2 weeks before the lettuce started heading, and again about 1 week from harvest. In lettuce, dimethoate partially oxidized to its oxon and pirimicarb converted to its methylamino‐ and/or formyl methylamino‐analogues. Most residues were present in the outer leaves which were exposed directly to the sprays; only traces of residues were detected in samples of the inner head leaves. Total residues disappeared rapidly. Pirimicarb was the least persistent and only traces of residues (<0.01 ppm) were detected in marketable heads. Concentrations of dimethoate, including the oxon and of methamidophos were well below their respective tolerances of 2 and 1 ppra respectively. 相似文献
43.
This study examined what factors best predict residents’ concerns about neighborhood safety. One-hundred and twenty-two participants were selected from a large, Midwestern metropolitan area. All participants lived in high crime areas. Participants completed a 22-item questionnaire that assessed their perceptions of neighborhood safety and vigilance. These items were clustered as: 1) Community care and vigilance, 2) neighborhood safety concerns, 3) physical incivilities, and 4) social incivilities. Police crime data were also used in the analyses. Our findings suggest that aspects of the broken window theory, collective efficacy, and place attachments/territoriality play a role in affecting residents’ concerns about neighborhood safety. 相似文献
44.
For many citizens and policymakers, the empirical relationship between economic growth and biodiversity conservation has not been sufficiently established for purposes of identifying the types of economic policies amenable to biodiversity conservation. Some think economic growth conflicts with biodiversity conservation; others think economic growth conduces biodiversity conservation. With panel data from 1997‐2011, encompassing US continental states, we developed a series of statistical models to investigate the relationships among species endangerment, human population, and economic growth as indicated by GDP and per capita GDP. Species endangerment is highly correlated with population and GDP, and per capita GDP is a significant regressor of species endangerment. Across US continental states, competitive exclusion of non‐human species occurs via human economic growth and population growth. 相似文献
45.
Ian R. Waite Jonathan G. Kennen Jason T. May Larry R. Brown Thomas F. Cuffney Kimberly A. Jones James L. Orlando 《Journal of the American Water Resources Association》2012,48(3):570-583
Waite, Ian R., Jonathan G. Kennen, Jason T. May, Larry R. Brown, Thomas F. Cuffney, Kimberly A. Jones, and James L. Orlando, 2012. Comparison of Stream Invertebrate Response Models for Bioassessment Metrics. Journal of the American Water Resources Association (JAWRA) 48(3): 570-583. DOI: 10.1111/j.1752-1688.2011.00632.x Abstract: We aggregated invertebrate data from various sources to assemble data for modeling in two ecoregions in Oregon and one in California. Our goal was to compare the performance of models developed using multiple linear regression (MLR) techniques with models developed using three relatively new techniques: classification and regression trees (CART), random forest (RF), and boosted regression trees (BRT). We used tolerance of taxa based on richness (RICHTOL) and ratio of observed to expected taxa (O/E) as response variables and land use/land cover as explanatory variables. Responses were generally linear; therefore, there was little improvement to the MLR models when compared to models using CART and RF. In general, the four modeling techniques (MLR, CART, RF, and BRT) consistently selected the same primary explanatory variables for each region. However, results from the BRT models showed significant improvement over the MLR models for each region; increases in R2 from 0.09 to 0.20. The O/E metric that was derived from models specifically calibrated for Oregon consistently had lower R2 values than RICHTOL for the two regions tested. Modeled O/E R2 values were between 0.06 and 0.10 lower for each of the four modeling methods applied in the Willamette Valley and were between 0.19 and 0.36 points lower for the Blue Mountains. As a result, BRT models may indeed represent a good alternative to MLR for modeling species distribution relative to environmental variables. 相似文献
46.
Richard M. Ryan Netta Weinstein Jessey Bernstein Kirk Warren Brown Louis Mistretta Marylène Gagné 《Journal of environmental psychology》2010
Five studies utilizing survey, experimental, and diary methods assessed the effects of being outdoors on subjective vitality. In Study 1, we used a vignette method to examine whether being outdoors was associated with vitality, above and beyond the influences of physical activity and social interactions. Study 2 explored the effects of being outdoors on vitality through an experimental design contrasting indoor and outdoor walks. In Study 3, participants were exposed to photographic scenes of either nature or buildings. Results showed that only the nature scenes enhanced subjective vitality. Studies 4 and 5 used a diary methodology to examine within-person variations in subjective energy as a function of being outdoors, again controlling for physical and social activity. Being outdoors was associated with greater vitality, a relation that was mediated by the presence of natural elements. Limitations of these studies are discussed, as well as their implications for research on energy and vitalization. 相似文献
47.
David L. MacIntosh James H. Stewart Theodore A. Myatt Joseph E. Sabato George C. Flowers Kirk W. Brown Dennis J. Hlinka David A. Sullivan 《Atmospheric environment (Oxford, England : 1994)》2010,44(2):262-270
CALPUFF is an atmospheric source-receptor model recommended by the U.S. Environmental Protection Agency for use on a case-by-case basis in complex terrain and wind conditions. The ability of the model to provide useful information for exposure assessments in areas with those topographical and meteorological conditions has received little attention. This is an important knowledge gap for use of CALPUFF outside of regulatory applications, such as exposure analyses conducted in support of risk assessments and health studies. We compared deposition of cadmium (Cd), lead (Pb), and zinc (Zn) calculated with CALPUFF as a result of emissions from a zinc smelter with corresponding concentrations of the metals measured in attic dust and soil samples obtained from the surrounding area. On a point-by-point analysis, predictions from CALPUFF explained 11% (lead) to 53% (zinc) of the variability in concentrations measured in attic dust. Levels of heavy metals in soil interpolated to 100 residential addresses from the distribution of concentrations measured in soil samples also agreed well with deposition predicted with CALPUFF: R2 of 0.46, 0.76, and 079 for Pb, Cd, and Zn, respectively. Community-average concentrations of Cd, Pb, and Zn measured in soil were significantly (p < 0.0001) and strongly correlated (R2 ranged from 0.77 to 0.98) with predicted deposition rates. These findings demonstrate that CALPUFF can provide reasonably accurate predictions of the patterns of long-term air pollutant deposition in the near-field associated with emissions from a discrete source in complex terrain. Because deposition estimates are calculated as a linear function of air concentrations, CALPUFF is expected to be reliable model for prediction of long-term average, near-field ambient air concentrations in complex terrain as well. 相似文献
48.
49.
Climate change, drought risk and land capability for agriculture: implications for land use in Scotland 总被引:1,自引:0,他引:1
Iain Brown Laura Poggio Alessandro Gimona Marie Castellazzi 《Regional Environmental Change》2011,11(3):503-518
Land capability classification systems define and communicate biophysical limitations on land use, including climate, soils
and topography. They can therefore provide an accessible format for both scientists and decision-makers to share knowledge
on climate change impacts and adaptation. Underlying such classifications are complex interactions that require dynamic spatial
analysis, particularly between soil and climate. These relationships are investigated using a case study on drought risk for
agriculture in Scotland, which is currently considered less significant than wetness-related issues. The impact of drought
risk is assessed using an established empirical system for land capability linking indicator crops with water availability.
This procedure is facilitated by spatial interpolation of climate and soil profile data to provide soil moisture deficits
and plant available water on a regular 1-km grid. To evaluate potential impacts of future climate change, land capability
classes are estimated using both large-scale ensemble (multi-simulation) data from the HadRM3 regional climate model and local-scale
weather generator data (UKCP09) derived from multiple climate models. Results for the case study suggest that drought risk
is likely to have a much more significant influence on land use in the future. This could potentially act to restrict the
range of crops grown and hence reduce land capability in some areas unless strategic-level adaptation measures are developed
that also integrate land use systems and water resources with the wider environment. 相似文献
50.
Petreas M Nelson D Brown FR Goldberg D Hurley S Reynolds P 《Environment international》2011,37(1):190-197
We measured major PBDEs and PCBs in breast adipose tissues of California women participating in a breast cancer study in the late 1990s. Samples were analyzed using gas chromatography with electron impact ionization and tandem mass spectrometry detection. The congener profile observed was: BDE47>BDE99>BDE153>BDE100>BDE154 and PCB153>PCB180>PCB138>PCB118. Whereas high correlations were observed within each chemical class, very weak correlations appeared between classes, pointing to different exposure pathways. Weak negative associations were observed for PBDE congeners and age. Our PBDE data are among the highest reported, exceeding data from the National Health and Nutrition Examination Survey and consistent with the high use of PBDEs in California. These data may be helpful in establishing a baseline for PBDE body burdens to gauge changes over time as a result of restrictions in the use of PBDE formulations. 相似文献