全文获取类型
收费全文 | 9735篇 |
免费 | 1篇 |
国内免费 | 1篇 |
专业分类
安全科学 | 5篇 |
废物处理 | 779篇 |
环保管理 | 1215篇 |
综合类 | 941篇 |
基础理论 | 3115篇 |
污染及防治 | 1773篇 |
评价与监测 | 1014篇 |
社会与环境 | 895篇 |
出版年
2023年 | 2篇 |
2022年 | 13篇 |
2021年 | 12篇 |
2020年 | 7篇 |
2019年 | 3篇 |
2018年 | 1475篇 |
2017年 | 1376篇 |
2016年 | 1199篇 |
2015年 | 125篇 |
2014年 | 14篇 |
2013年 | 21篇 |
2012年 | 464篇 |
2011年 | 1338篇 |
2010年 | 691篇 |
2009年 | 599篇 |
2008年 | 878篇 |
2007年 | 1226篇 |
2006年 | 2篇 |
2005年 | 19篇 |
2004年 | 34篇 |
2003年 | 63篇 |
2002年 | 99篇 |
2001年 | 16篇 |
2000年 | 10篇 |
1999年 | 2篇 |
1998年 | 9篇 |
1995年 | 1篇 |
1992年 | 2篇 |
1984年 | 14篇 |
1983年 | 11篇 |
1982年 | 1篇 |
1981年 | 1篇 |
1980年 | 2篇 |
1974年 | 2篇 |
1966年 | 1篇 |
1965年 | 1篇 |
1964年 | 2篇 |
1935年 | 2篇 |
排序方式: 共有9737条查询结果,搜索用时 0 毫秒
961.
Jun Bi Yongliang Zhang Bing Zhang 《Frontiers of Environmental Science & Engineering》2010,4(3):361-372
In developing countries, there is controversy over the correct perception regarding environmental and developmental issues. Few studies have examined the perception of low-income nationals in regards to social and environmental issues. This paper looks at the relationship between socio-demographic factors and the groups’ perceived priority regarding environmental and social issues in Wujin County. The results indicated that most residents, specifically the young, government employed and the urban community consider environmental issues to be serious, especially in relation to air pollution and water pollution. Furthermore, many residents feel it is important to rank environmental problems that are related to other social and economic issues, and that environmental protection must be set as a priority in Wujin County. Compared to social issues, environmental concern was greater among the young, government employed, and the urban community, because of their higher education and affluence. In addition, 66.2% of residents consider environmental protection to be more important than economic development. Thus, environmental protection must be set as a high priority in Wujin County, in order to face the many social and environmental challenges inherent in development. 相似文献
962.
It is necessary to identify the hydrogeochemical processes and analyze the causes of groundwater pollution due to the lack of knowledge about the groundwater chemical characteristics and the endemic diseases caused by groundwater pollution in the northern Ordos Cretaceous Basin. In this paper, groundwater chemical facies were obtained using the piper trilinear diagram based on the analysis of 190 samples. The hydrogeochemical processes were identified using ionic ratio coefficient, such as leaching, evaporation and condensation. The causes and sources of groundwater pollution were analyzed by correspondence analysis, and the spatial distribution and enrichment reasons of fluoride ion were analyzed considering the endemic fluorosis emphatically. The results show that leaching, evaporation and condensation, mixing, and anthropogenic activities all had significant impact on hydrogeochemical processes in the study area. However, cation exchange and adsorption effects were strong in the S2 and S3 groundwater flow systems, but weak in S1. Groundwater is mainly polluted by Mn and CODMn in the study area. The landfill leachate, domestic sewage, and other organic pollutants, excessive use of pesticides and fertilizers in agriculture, and pyrite oxidation from long-term and large-scale exploitation of coal are the sources of groundwater pollution. The S1 has the highest degree of groundwater pollution, followed by S2 and S3. High concentration of fluoride ion is mainly distributed in the north and west of study area. Evaporation and condensation and groundwater chemistry component are the most important causes of fluoride ion enrichment. The results obtained in this study will be useful for understanding the groundwater quality for effective management and utilization of groundwater resources and assurance of drinking water safety. 相似文献
963.
Richard C. Foltz 《Journal of Agricultural and Environmental Ethics》2007,20(6):533-542
964.
Başak K. Taşeli 《The Environmentalist》2007,27(3):315-327
Environmental pollution and degradation of ecosystems considerably affect the natural resources. The Turkish Government is
aware of the importance of the preservation of natural ecology and thereby the environmental conservation of many species
in their natural habitat. This paper provides critical assessments of the problems and possible solutions in the identification,
implementation and management of the Specially Protected Areas (SPAs) system by giving basic information about stakeholders
and their responsibilities that currently offer nature conservation in Turkey. The goals of the article are to analyze how
the SPAs interface with the local people, especially the villagers who have dwelt there before SPA designation and how people-SPA
conflicts resolved; to show how effective the SPA conservation objectives have been; to outline the significance of informing
and empowering people in nature conservation for the protected area management and to show the importance of planning at all
levels during protection of the natural, archeological and cultural values of the SPAs. 相似文献
965.
Marko S. Markov 《The Environmentalist》2007,27(4):465-475
Magnetic and electromagnetic fields are now recognized by the 21st century medicine as real physical entities that promise
the healing of various health problems, even when conventional medicine has failed. Today magnetotherapy provides a non-invasive,
safe, and easy method to directly treat the site of injury, the source of pain and inflammation, and other types of diseases
and pathologies. Millions of people worldwide have received help in treatment of musculoskeletal system, as well as pain relief.
Pulsed electromagnetic fields are one important modality in magnetotherapy and recent technological innovations, such as Curatron
pulsed electromagnetic field devices, offer excellent, state of the art computer controlled therapy system. In this article
the development, state of the art and future of pulsed electromagnetic field therapy are discussed. 相似文献
966.
Ellen-Marie Forsberg 《Journal of Agricultural and Environmental Ethics》2007,20(5):455-468
The ethical matrix approach was developed by Prof Ben Mepham and his colleagues at the University of Nottingham in the early
1990s. Since then the approach has received increasing attention and has been used by several researchers in different projects
related to assessing ethical impacts of different food production technologies and other policy options of societal concern.
The ethical matrix is sometimes understood simply as a checklist of ethical concerns, but might also be seen as a guide to
coming to conclusions on moral questions. The problem I discuss in this paper relates to how using the ethical matrix method
as a decision guide can be combined with respecting pluralism. The aim of the paper is to suggest a framework making it possible
to – at the same time – enhance public justification of judgments and respect pluralism. I argue that pluralism is fundamental
to the ethical matrix approach; I distinguish between intuitionist principled pluralism and societal value pluralism; and I show how both kinds of pluralism imply restrictions on how conclusions can be made. No substantive moral decision
principles can be allowed. Still, I argue, decision principles of a more epistemological or procedural character can be acceptable
even within pluralism. The pragmatist principle of inquiry is defended as an account of moral problem solving compatible with
both principled pluralism and value pluralism. When an ethical matrix is used within such a participatory inquiry process
substantive conclusions can be drawn. 相似文献
967.
A time series study of the copepods Calanus chilensis and Centropages brachiatus was carried out at the coastal upwelling zone of Mejillones (23°S, northern Chile), to analyze their annual life cycles in
association with upwelling variation. These species co-exist in the upwelling zone. Weekly sampling of zooplankton and oceanographic
variables including Chlorophyll-a and phytoplankton composition were obtained during January–December 2002 at a fixed station (ca. 90 m depth). Stages of abundances,
their proportions, changes in body length of adult females, sex ratio and egg production rate (EPR), were used as proxies
to examine copepods’ demography. Upwelling, assessed by weekly Ekman transport and oceanographic conditions, was intermittent
throughout the year with lack of periodicity components. Populations of both copepod species did not correlate with these
non-predictable upwelling events. C. chilensis reproduced year-round and the population showed ca. 15 peaks of adults with an average time interval between peaks of 20 days.
C. brachiatus showed a similar life cycle, also having 15 peaks of adults at about 22 days of time intervals. Cross-correlation functions
and spectral analysis showed that both populations correlated positively through time, but not in phase, evidencing a time
lag for their reproductive cycles. The lag was also evident in their population abundances. Both species differ in their development
rates and this may result in non-in phase life cycles. Our findings suggest that species-dependent attributes, such as development
rates, modulated by adaptations to temperature, might impose constraints in the species life cycles determining the population
cycles. Such attributes must be considered when modeling and understanding population dynamics and secondary production of
copepods. 相似文献
968.
969.
Thorsten Stahl Sandy Falk Alice Rohrbeck Sebastian Georgii Christin Herzog Alexander Wiegand Svenja Hotz Bruce Boschek Holger Zorn Hubertus Brunn 《Environmental Sciences Europe》2017,29(1):17
Background
When cooking on a barbecue grill, consumers often use aluminum grill pans. For one, the pan catches the fats and oils that would drip into the embers causing the formation of potentially noxious smoke, and the pan also protects the food from being burned by direct heat from the coals. In addition, new aluminum products for use in ovens and grills are becoming increasingly popular. Due to their light weight and excellent heat transfer camping, utensils made of aluminum are, for example, often used by fishermen and mountain climbers. Preparing food in aluminum utensils can, however, result in migration of the aluminum to the foodstuffs.Results/Conclusions
In this study presented here, it was found that the transfer limit of 5.00 mg/L for aluminum is not exceeded using simulants for oil or for tap water; however, with an aqueous solution of 0.5% citric acid, the limit is clearly exceeded at 638 mg/L. This means that the Tolerable Weekly Intake (TWI) is exceeded by 298% for a child weighing 15 kg and for an adult weighing 70 kg it is equivalent to 63.8% of the TWI, assuming a daily uptake of 10 mL marinade containing lemon juice over a period of 1 week. Preparation of a fish dish with a marinade containing lemon juice in camping dishes would result in the TWI being exceeded by 871% for a child weighing 15 kg and by 187% for an adult weighing 70 kg assuming a daily uptake of 250 g over a period of 1 week.970.
Gerald Schernewski Johanna Schumacher Eva Weisner Larissa Donges 《Journal of Coastal Conservation》2018,22(3):533-547
Markgrafenheide-Hütelmoor covers a total area of 1000 ha (about 490 ha are coastal moor) and a coastline of about 6 km. This touristy area belongs to the city of Rostock in Germany. As response to sea level rise and heavy coastal erosion, the small seaside resort Markgrafenheide received a comprehensive storm surge protection until 2006. Subsequently, the adjacent Hütelmoor was flooded with the aim to restore it as a brackish coastal moor. Coastal protection measures at the Baltic Sea coastline were abandoned to enable natural dynamics, a coastal realignment and salt water intrusions. The entire process until full implementation took 14 years and was associated with very problematic public participation and a strong local polarization. Based on a literature and media review, two surveys, and expert interviews we retrospectively document and analyse the planning process with focus on public information, perception and participation. The local population and holidaymakers did not perceive coastal changes and if, did not associate them with climate change. Interviewees remembered single storm surges, but felt save from it and sea level rise was not perceived as a threat. 89% said that they feel insufficiently informed about the combined coastal protection wetland restoration measure, but did not use the offered information possibilities. 81% had their information from newspapers and freely distributed advertisers. It seems that insufficient information was the major reason for the problems with local acceptance and public participation. The media played a dominating role. The decline of traditional newspapers and the growths of free advertisers seemed to have a negative impact on quality of information and favoured a polarization. Additionally, we discuss local specifics like the cultural background (GDR history), traditions, frustration and the relatively old population and their role in public participation. We strongly promote a pro-active and long-term information and public relation strategy. 相似文献