全文获取类型
收费全文 | 5858篇 |
免费 | 57篇 |
国内免费 | 29篇 |
专业分类
安全科学 | 174篇 |
废物处理 | 278篇 |
环保管理 | 461篇 |
综合类 | 949篇 |
基础理论 | 1429篇 |
环境理论 | 5篇 |
污染及防治 | 1845篇 |
评价与监测 | 448篇 |
社会与环境 | 331篇 |
灾害及防治 | 24篇 |
出版年
2023年 | 61篇 |
2022年 | 133篇 |
2021年 | 157篇 |
2020年 | 83篇 |
2019年 | 88篇 |
2018年 | 196篇 |
2017年 | 231篇 |
2016年 | 291篇 |
2015年 | 209篇 |
2014年 | 306篇 |
2013年 | 458篇 |
2012年 | 325篇 |
2011年 | 392篇 |
2010年 | 252篇 |
2009年 | 226篇 |
2008年 | 359篇 |
2007年 | 338篇 |
2006年 | 262篇 |
2005年 | 214篇 |
2004年 | 198篇 |
2003年 | 174篇 |
2002年 | 145篇 |
2001年 | 94篇 |
2000年 | 50篇 |
1999年 | 55篇 |
1998年 | 31篇 |
1997年 | 27篇 |
1996年 | 27篇 |
1995年 | 38篇 |
1994年 | 41篇 |
1993年 | 16篇 |
1992年 | 22篇 |
1991年 | 22篇 |
1990年 | 24篇 |
1989年 | 19篇 |
1988年 | 17篇 |
1987年 | 14篇 |
1986年 | 26篇 |
1985年 | 14篇 |
1984年 | 16篇 |
1983年 | 16篇 |
1982年 | 20篇 |
1981年 | 12篇 |
1980年 | 13篇 |
1966年 | 16篇 |
1965年 | 10篇 |
1958年 | 9篇 |
1957年 | 9篇 |
1956年 | 11篇 |
1954年 | 9篇 |
排序方式: 共有5944条查询结果,搜索用时 218 毫秒
101.
Houet Thomas Grémont Marine Vacquié Laure Forget Yann Marriotti Apolline Puissant Anne Bernardie Séverine Thiery Yannick Vandromme Rosalie Grandjean Gilles 《Regional Environmental Change》2017,17(8):2293-2307
Regional Environmental Change - Better understanding the pathways through which future socioeconomic changes might influence land use and land cover changes (LULCCs) is a crucial step in accurately... 相似文献
102.
Pfendler Stéphane Einhorn Olympe Karimi Battle Bousta Faisl Cailhol Didier Alaoui-Sosse Laurence Alaoui-Sosse Badr Aleya Lotfi 《Environmental science and pollution research international》2017,24(31):24611-24623
Environmental Science and Pollution Research - Ultra-violet C (UV-C) treatment is commonly used in sterilization processes in industry, laboratories, and hospitals, showing its efficacy against... 相似文献
103.
Dung Tran Thi Thu Vassilieva Elvira Golreihan Asefeh Phung Nguyen Ky Swennen Rudy Cappuyns Valérie 《Journal of Material Cycles and Waste Management》2017,19(3):1194-1203
Journal of Material Cycles and Waste Management - Understanding the chemical and mineralogical characteristics of bottom ash (BA) containing Potentially Toxic Elements (PTEs, e.g., As, Cd, Co, Cu,... 相似文献
104.
Jérémy Bonvoisin 《International Journal of Sustainable Engineering》2017,10(4-5):198-206
AbstractIn pursuit of coping mechanisms for the challenges of sustainable manufacturing, systematic methods have been developed to allow engineers to improve the ratio between products’ utility and environmental impact. These necessary efforts remain however limited if the surrounding production and consumption practices are not called into question at the same time. This article introduces open source product development as a potential approach for unlocking the limits of existing sustainable product design practices and to lead towards alternative and eco-efficient production and consumption practices termed as participative production. First, it discusses the potential advantages of this emerging practice in terms of environmental sustainability. Second, it provides a screened qualitative environmental analysis of 18 exemplary open source hardware products. Specific sustainable design principles implemented by these products are highlighted and discussed in order to identify challenges for further common research in the field of open source and sustainable product development. 相似文献
105.
Elisa Oteros-Rozas Berta Martín-López José A. González Tobias Plieninger César A. López Carlos Montes 《Regional Environmental Change》2014,14(4):1269-1289
The ecosystem services framework is receiving increasing attention in the fields of policy and research. The assessment of human attitudes and perceptions regarding ecosystem services has been proposed as a promising tool for addressing complex problems associated with environmental change, particularly in the context of cultural landscapes. Transhumance is not only a farming practice responsible for shaping cultural landscapes but also an adaptive strategy based on mobility that may represent a useful approach to overcoming the growing challenges posed by accelerated environmental change. A socio-cultural valuation of ecosystem services associated with the Conquense Drove Road, one of the major transhumant networks still in use in Mediterranean Spain, was conducted via the distribution of questionnaires to 416 local residents and visitors to capture their perceptions regarding the importance of 34 ecosystem services (10 provisioning, 12 regulating, and 12 cultural) for both social and personal well-being. Overall, the ecosystem services considered to be the most important for social well-being were fire prevention, air purification and livestock. Most of the ecosystem services in question were perceived as declining, with the exception of those associated with recreation, scientific knowledge and environmental education. This study revealed that perceptions regarding the value of ecosystem services differed among respondents, depending on their age, place of origin and gender. Several methodological issues, as well as the implications of socio-cultural valuation for policy making, are also discussed here. 相似文献
106.
Jeanne Clécia Alves Esther Lima de Paiva Raquel Fernanda Milani Eduardo Bearzoti Marcelo Antonio Morgano 《Journal of environmental science and health. Part. B》2017,52(6):418-424
Although fish is a healthy alternative for meat, it can be a vehicle for mercury (Hg), including in its most toxic organic form, methylmercury (MeHg). The objective of the present study was to estimate the risk to human health caused by the consumption of sushi and sashimi as commercialized by Japanese food restaurants in the city of Campinas (SP, Brazil). The total Hg content was determined by atomic absorption spectrometry with thermal decomposition and amalgamation, and the MeHg content calculated considering that 90% of the total Hg is in the organic form. The health risk was estimated from the values for the provisional tolerable weekly ingestion (PTWI) by both adults and children. The mean concentrations for total Hg were: 147.99, 6.13, and 3.42 µg kg?1 in the tuna, kani, and salmon sushi samples, respectively, and 589.09, 85.09, and 11.38 µg kg?1 in the tuna, octopus and salmon sashimi samples, respectively. The tuna samples showed the highest Hg concentrations. One portion of tuna sashimi exceeded the PTWI value for MeHg established for children and adults. The estimate of risk for human health indicated that the level of toxicity depended on the type of fish and size of the portion consumed. 相似文献
107.
Climate change represents one of the most pressing societal and scientific challenges of our time. While much of the current research on climate change focuses on future prediction, some of the strongest signals of warming can already be seen in Arctic and alpine areas, where temperatures are rising faster than the global average, and in the oceans, where the combination of rising temperatures and acidification due to increased CO2 concentrations has had catastrophic consequences for sensitive marine organisms inhabiting coral reefs. The scientific papers highlighted as part of this anniversary issue represent some of the most impactful advances in our understanding of the consequences of anthropogenic climate change. Here, we reflect on the legacy of these papers from the biotic perspective. 相似文献
108.
To achieve a safe and reliable drinking water supply, water producers need to manage a large range of risks regarding both water quality and quantity. A risk management approach where risks are systematically identified and handled in a preventive manner is promoted by the World Health Organization and supported by researchers and drinking water experts worldwide. Risk assessment is an important part of such a management approach, and a variety of tools for risk assessment are described in the literature. There is, however, little knowledge of how drinking water risk assessment is performed in practice, including which tools that are actually used. This study investigates the use of risk assessment tools, and the approach to risk management, on a local level in the Swedish water sector. It is based on interviews with key persons from a targeted selection of water producers. We find that the application of tools as well as the approach to risk assessment and management differs considerably between the water producers. The tools most frequently used are mainly the ones promoted or required by Swedish national organizations. Although many of the water producers have done some kind of risk assessment, most have not implemented a risk management approach. Furthermore, their knowledge of the concepts of risk and risk management is often limited. The largest challenge identified is to prioritize risk assessment, so that it is actually performed and then used as a basis for managing risk in a systematic way. 相似文献
109.
Oili?TarvainenEmail author Anne?Tolvanen 《Environmental science and pollution research international》2016,23(14):13732-13744
Reclaiming abandoned and unmaintained roads, built originally for forestry and mineral extraction, is an important part of ecological restoration, because the roads running through natural habitats cause fragmentation. The roads can be reclaimed in a passive way by blocking access to the road, but successful seedling recruitment may require additional management due to the physical constraints present at the road. We established a full factorial study to compare the effects of three road reclaiming measures, namely ripping, creation of safe sites by adding mulch and pine seed addition, on soil processes, recovery of understorey vegetation and seedling recruitment in three conservation areas in eastern Finland. We surveyed soil organic matter, frequency and cover of plant functional types, litter and mineral soil, and number of tree seedlings. The soil organic matter was, on average, 1.3-fold in the 50-cm-deep ripping treatment relative to unripped and 20-cm-deep ripping treatments. The germination and survival of deciduous seedlings and grass establishment were promoted by adding mulch. The addition of pine seeds counteracted the seed limitation and enhanced the regeneration of trees. The treatment combination consisting of ripping, adding mulch and pine seed addition enhanced the vegetation succession and tree-seedling recruitment most: the cover of grasses, herbs and ericaceous dwarf shrubs was 1.3–7.6-fold and the number of coniferous tree seedlings was 3.4–7.1-fold relative to the other treatment combinations. Differences between short-term (1–3 years) and longer-term (6 years) results indicate the need for a sufficient observation period in road reclamation studies. 相似文献
110.
Gara Luis Carmen Rubio Ángel. J. Gutiérrez Dailos González-Weller Consuelo Revert Arturo Hardisson 《Environmental monitoring and assessment》2014,186(1):433-440
Sweet potatoes are a staple in the diet of some people and an excellent source of minerals. Metal monitoring in food, like sweet potatoes, provides basic information on safety aspects in regulatory processes as well as nutritional values. One hundred five samples of three varieties of sweet potatoes were randomly obtained from supermarkets, farmers markets, and farmers' plots in Tenerife (Canary Islands, Spain). The edible portion (pulp) was the only part considered for analysis. Flame atomic absorption spectrometry was used to determine the contents of sodium (Na), potassium (K), calcium (Ca), magnesium (Mg), copper (Cu), iron (Fe), manganese (Mn), and zinc (Zn), while the levels of chromium (Cr), nickel (Ni), cadmium (Cd), and lead (Pb) were determined using graphite furnace atomic absorption spectrometry. The mean concentrations were 500 Na, 4409 K, 564 Ca, 609 Mg, 1.291 Cu, 6.554 Fe, 2.324 Mn, 2.348 Zn, 0.028 Cr, 0.048 Ni, 0.001 Cd, and 0.003 Pb mg/kg, respectively. Potassium presented the highest contents in all varieties of sweet potatoes. Iron was the most abundant microelement. The orange fleshed sweet potato variety offered greater nutritional contributions to the recommended intakes than the rest of the varieties studied. The estimated mean daily intake of Ni (0.72 mg/day) detected in our samples was highly consistent with other studies. Average daily intakes of Cd (0.015 μg/day) and Pb (0.045 μg/day) were below toxicological reference values. In conclusion, the levels of Cd and Pb detected in the sweet potatoes analyzed do not represent any toxicological risk to consumers. 相似文献