全文获取类型
收费全文 | 41463篇 |
免费 | 839篇 |
国内免费 | 4646篇 |
专业分类
安全科学 | 1603篇 |
废物处理 | 1846篇 |
环保管理 | 4915篇 |
综合类 | 11472篇 |
基础理论 | 10504篇 |
环境理论 | 27篇 |
污染及防治 | 11972篇 |
评价与监测 | 2189篇 |
社会与环境 | 1667篇 |
灾害及防治 | 753篇 |
出版年
2023年 | 305篇 |
2022年 | 726篇 |
2021年 | 652篇 |
2020年 | 507篇 |
2019年 | 568篇 |
2018年 | 853篇 |
2017年 | 933篇 |
2016年 | 1069篇 |
2015年 | 1179篇 |
2014年 | 1627篇 |
2013年 | 3388篇 |
2012年 | 1849篇 |
2011年 | 2427篇 |
2010年 | 1861篇 |
2009年 | 1862篇 |
2008年 | 2118篇 |
2007年 | 2003篇 |
2006年 | 1826篇 |
2005年 | 1478篇 |
2004年 | 1336篇 |
2003年 | 1360篇 |
2002年 | 1311篇 |
2001年 | 1534篇 |
2000年 | 1176篇 |
1999年 | 932篇 |
1998年 | 744篇 |
1997年 | 737篇 |
1996年 | 732篇 |
1995年 | 742篇 |
1994年 | 614篇 |
1993年 | 546篇 |
1992年 | 527篇 |
1991年 | 466篇 |
1990年 | 440篇 |
1989年 | 465篇 |
1988年 | 391篇 |
1987年 | 319篇 |
1986年 | 298篇 |
1985年 | 316篇 |
1984年 | 297篇 |
1983年 | 331篇 |
1982年 | 332篇 |
1981年 | 273篇 |
1980年 | 243篇 |
1979年 | 269篇 |
1978年 | 229篇 |
1977年 | 195篇 |
1976年 | 200篇 |
1975年 | 192篇 |
1972年 | 198篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
1.
Ma Huimin Di Danyang Li Lin Zhang Wei Wang Jianmei 《Environmental geochemistry and health》2022,44(9):2905-2918
Environmental Geochemistry and Health - Effective supply of environmental public services (EPS) is important to guarantee the mitigation of residential pollution exposure risk. This study analyzes... 相似文献
2.
Nicole Shumway Megan I. Saunders Sam Nicol Richard A. Fuller Noam Ben-Moshe Takuya Iwamura Sun W. Kim Nicholas J. Murray James E. M. Watson Martine Maron 《Conservation biology》2023,37(2):e14031
Biodiversity offsets aim to counterbalance the residual impacts of development on species and ecosystems. Guidance documents explicitly recommend that biodiversity offset actions be located close to the location of impact because of higher potential for similar ecological conditions, but allowing greater spatial flexibility has been proposed. We examined the circumstances under which offsets distant from the impact location could be more likely to achieve no net loss or provide better ecological outcomes than offsets close to the impact area. We applied a graphical model for migratory shorebirds in the East Asian–Australasian Flyway as a case study to explore the problems that arise when incorporating spatial flexibility into offset planning. Spatially flexible offsets may alleviate impacts more effectively than local offsets; however, the risks involved can be substantial. For our case study, there were inadequate data to make robust conclusions about the effectiveness and equivalence of distant habitat-based offsets for migratory shorebirds. Decisions around offset placement should be driven by the potential to achieve equivalent ecological outcomes; however, when considering more distant offsets, there is a need to evaluate the likely increased risks alongside the potential benefits. Although spatially flexible offsets have the potential to provide more cost-effective biodiversity outcomes and more cobenefits, our case study showed the difficulty of demonstrating these benefits in practice and the potential risks that need to be considered to ensure effective offset placement. 相似文献
3.
Mao Haobo Zhang Yingyi Wang Hong Cui Kunkun Yu Laihao Tan Tianbiao 《Environmental Chemistry Letters》2023,21(3):1659-1672
Environmental Chemistry Letters - Huge amounts of unwanted sewage sludge are generated in the process of wastewater treatment, calling for methods to recycle sewage sludges into value-added... 相似文献
4.
Jørn Cruickshank 《Journal of Environmental Policy & Planning》2018,20(3):313-327
In the Lister region in the southern part of Norway, attempts are currently being made to facilitate for a green shift. The paper discusses two different approaches towards such a challenge. The first is procedural, where success or failure hinges on the methods applied in the effort to convince locals to incorporate climate considerations. The alternative is to reflect upon how a green ideology blends into pre-existing ideological elements in the region. It is claimed that an important reason for the failure so far to place the environment at the core of regional development, is that too much emphasis has been put on the first approach, on procedure and dialogue, whereas few efforts have been made to understand the structure of the discursive terrain in the region. What prevents a green shift has less to do with methods and is more connected to the dominance of a logic of economic growth and the fact that locals are confident that nature is already dealt with in a sensible manner. The conclusion is that we need to understand what people are concerned about and what prevents them to change, before we start telling them how to think and do development. 相似文献
5.
Mathew J. Hardy James A. Fitzsimons Sarah A. Bekessy Ascelin Gordon 《Conservation biology》2018,32(2):276-286
Finding sustainable ways to increase the amount of private land protected for biodiversity is challenging for many conservation organizations. In some countries, organizations use revolving‐fund programs, whereby land is purchased and then sold to conservation‐minded owners under condition they enter into a conservation covenant or easement. The sale proceeds are used to purchase, protect, and sell additional properties, incrementally increasing the amount of protected private land. Because the effectiveness of this approach relies on selecting appropriate properties, we explored factors currently considered by practitioners and how these are integrated into decision making. We conducted exploratory, semistructured interviews with managers from each of the 5 major revolving funds in Australia. Responses indicated although conservation factors are important, financial and social factors are also highly influential. A major determinant was whether the property could be resold within a reasonable period at a price that replenishes the fund. To facilitate resale, often selected properties include the potential for the construction of a dwelling. Practitioners face with clear trade‐offs between conservation, financial, amenity, and other factors in selecting properties and 3 main challenges: recovering the costs of acquisition, protection, and resale; reselling the property; and meeting conservation goals. Our findings suggest the complexity of these decisions may constrain revolving‐fund effectiveness. Drawing from participant responses, we identified potential strategies to mitigate these risks, such as providing adequate recreational space without jeopardizing ecological assets. We suggest managers could benefit from a shared‐learning and adaptive approach to property selection given the commonalities between programs. Understanding how practitioners deal with complex decisions in the implementation of revolving funds helps identify future research to improve the performance of this conservation tool. 相似文献
6.
Channa argus, a type of snakehead fish native to China, is a popular food fish in certain Asian countries but is a known destructive invasive species in the US. In this study, the two collagens, i.e. acid-soluble collagen (ASC) and pepsin-solubilized collagen (PSC), were obtained from C. argus skin. The yield of ASC was 28.0% and that of PSC was 16.8% on the dry bases. The collagens were identified as the collagen of type I by SDS–PAGE patterns. The Tds were approximately 27.0?°C. Similar ultraviolet spectra of both collagens were observed. Fourier Transform infrared spectra indicated PSC structure had a little change due to the loss of terminal domains by pepsin digestion. The results of XRD proved that the two collagens retained their helical structures. The results suggest that the collagens isolated from C. argus can potentially be alternative sources of vertebrate collagens for use in the food and other industries. 相似文献
7.
Chaojin Jiang Xiaoqian Jiang Lixun Zhang Yuntao Guan 《Frontiers of Environmental Science & Engineering》2020,14(3):47
8.
Xinjie Wang Yang Li Jian Zhao Hong Yao Siqi Chu Zimu Song Zongxian He Wen Zhang 《Frontiers of Environmental Science & Engineering》2020,14(4):56
9.
Felton Adam Löfroth Therese Angelstam Per Gustafsson Lena Hjältén Joakim Felton Annika M. Simonsson Per Dahlberg Anders Lindbladh Matts Svensson Johan Nilsson Urban Lodin Isak Hedwall P. O. Sténs Anna Lämås Tomas Brunet Jörg Kalén Christer Kriström Bengt Gemmel Pelle Ranius Thomas 《Ambio》2020,49(5):1065-1066
Ambio - In the original published article, the sentence “Nevertheless, semi-natural forest remnants continue to be harvested and fragmented (Svensson et al. 2018; Jonsson et al. 2019), and... 相似文献
10.
Hu Qili Zhang Zhenya 《Environmental science and pollution research international》2020,27(35):43865-43869
Environmental Science and Pollution Research - Besides adsorption rate constant, the half-life was also a basic factor that described the characteristics of adsorption kinetics. However, the direct... 相似文献