全文获取类型
收费全文 | 34806篇 |
免费 | 367篇 |
国内免费 | 273篇 |
专业分类
安全科学 | 977篇 |
废物处理 | 1452篇 |
环保管理 | 4799篇 |
综合类 | 5353篇 |
基础理论 | 9561篇 |
环境理论 | 14篇 |
污染及防治 | 9347篇 |
评价与监测 | 2179篇 |
社会与环境 | 1520篇 |
灾害及防治 | 244篇 |
出版年
2022年 | 224篇 |
2021年 | 267篇 |
2019年 | 249篇 |
2018年 | 425篇 |
2017年 | 448篇 |
2016年 | 735篇 |
2015年 | 576篇 |
2014年 | 868篇 |
2013年 | 2834篇 |
2012年 | 1047篇 |
2011年 | 1430篇 |
2010年 | 1153篇 |
2009年 | 1238篇 |
2008年 | 1471篇 |
2007年 | 1576篇 |
2006年 | 1388篇 |
2005年 | 1157篇 |
2004年 | 1168篇 |
2003年 | 1106篇 |
2002年 | 1074篇 |
2001年 | 1347篇 |
2000年 | 1008篇 |
1999年 | 569篇 |
1998年 | 445篇 |
1997年 | 449篇 |
1996年 | 491篇 |
1995年 | 525篇 |
1994年 | 503篇 |
1993年 | 460篇 |
1992年 | 432篇 |
1991年 | 419篇 |
1990年 | 447篇 |
1989年 | 418篇 |
1988年 | 390篇 |
1987年 | 369篇 |
1986年 | 330篇 |
1985年 | 314篇 |
1984年 | 383篇 |
1983年 | 344篇 |
1982年 | 390篇 |
1981年 | 360篇 |
1980年 | 297篇 |
1979年 | 321篇 |
1978年 | 262篇 |
1977年 | 231篇 |
1976年 | 209篇 |
1975年 | 213篇 |
1974年 | 210篇 |
1973年 | 224篇 |
1972年 | 230篇 |
排序方式: 共有10000条查询结果,搜索用时 656 毫秒
921.
Abstract: As zebra mussels (Dreissena polymorpha) continue to spread among inland lakes of the United States and Canada, there is growing interest from professionals, citizens, and other stakeholders to know which lakes are likely to be colonized by zebra mussels. Thus, we developed a classification of lake suitability for zebra mussels on the basis of measured or estimated concentrations of dissolved calcium in lake water and applied the classification to >11,500 lakes in Wisconsin and the Upper Peninsula of Michigan. The majority of lakes (58%) were classified as unsuitable (<10 mg/L Ca) for survival and reproduction of zebra mussels, 27% were identified as suitable (≥21 mg/L Ca), and 15% were classified as borderline suitable (≥10 and <21 mg/L Ca). Of the 77 inland lakes with confirmed zebra mussel records for which data on dissolved calcium were available, our method classified 74 as suitable and 3 as borderline suitable. To communicate this lake‐specific suitability information and to help prioritize regional efforts to monitor and prevent the expansion of zebra mussels and other invasive species, we developed a web‐based interface (available from http://www.aissmartprevention.wisc.edu/ ). Although we are still uncertain of how access to suitability information ultimately affects decision making, we believe this is a useful case study of building communication channels among researchers, practitioners, and the public. 相似文献
922.
Mountain ecosystems are considered vulnerable to early impacts of climate change. Whether and how local residents of these areas perceive these changes, however, remain under-studied questions. By conducting a household survey in the Khumbu region of Nepal, this study assessed local residents’ experience-based perception of changes in climate trends and patterns, perceived risk, and attitudes towards climate issues. Multivariate cluster analysis based on residents’ climate change beliefs revealed three segments: “Cautious,” “Disengaged,” and “Alarmed.” A comparison of these segments along key psychosocial constructs of Protection Motivation Theory (PMT) revealed significant inter-segment differences in residents’ perception of severity, vulnerability, response efficacy, self-efficacy, and response cost associated with engaging in mitigating behavior. Results shed light on how residents of high elevation areas that are considered to be exposed to early impacts of climate change perceive the risk and intend to respond. These findings could also assist stakeholders working in other similar mountain ecosystems in understanding vulnerability and in working towards climate readiness.Electronic supplementary materialThe online version of this article (10.1007/s13280-020-01369-x) contains supplementary material, which is available to authorized users. 相似文献
923.
Gómez-Tolosa María Rivera-Velázquez Gustavo Rioja-Paradela Tamara M. Mendoza-Cuenca Luis F. Tejeda-Cruz César López Sergio 《Environmental science and pollution research international》2021,28(2):1381-1396
Environmental Science and Pollution Research - The order Odonata has been regularly used as an indicator of the ecosystem’s condition. The objective of this review was to analyze the... 相似文献
924.
Mougin Christian Campbell Peter G. C. Couderchet Michel Denèfle Patrice Martin-Laurent Fabrice Roland Philippe Slaveykova Vera I. Vincent Tatiana Delaunay Delphine 《Environmental science and pollution research international》2021,28(2):1283-1286
Environmental Science and Pollution Research - The scientific knowledge produced by academic research can be valued in all sectors of human activity, including private sector. The ROVALTAIN... 相似文献
925.
Costa Elizângela Pinheiro Starling Maria Clara Vieira Martins Amorim Camila C. 《Environmental science and pollution research international》2021,28(19):24092-24111
Environmental Science and Pollution Research - This work presents a bibliographic review of the literature regarding the simultaneous removal of contaminants of emerging concern (CECs) and... 相似文献
926.
Suneel V. Sathish Kumar S. Balaji R. Vethamony P. 《Environmental science and pollution research international》2021,28(14):17181-17199
Environmental Science and Pollution Research - Formation of oil-suspended sediment aggregates (OSAs) is believed to be one of the natural cleaning processes in the marine environment. In this... 相似文献
927.
Novack Aline M. dos Reis Glaydson S. Hackbarth Fabíola V. Marinho Belisa A. Ðolić Maja B. Valle José A. B. Sampaio Carlos H. Lima Eder C. Dotto Guillherme L. Ulson de Souza Antônio Augusto Vilar Vítor J. P. Guelli Ulson de Souza Selene M. A. 《Environmental science and pollution research international》2021,28(19):23568-23581
Environmental Science and Pollution Research - This paper presents the synthesis of a hybrid material through the use of natural pozzolan and titanium(IV) isopropoxide using the sol-gel method and... 相似文献
928.
Nature-based solutions (NbS) are increasingly recognized as sustainable approaches to address societal challenges. Disaster risk reduction (DRR) has benefited by moving away from purely ‘grey’ infrastructure measures towards NbS. However, this shift also furthers an increasing trend of reliance on public acceptance to plan, implement and manage DRR measures. In this review, we examine how unique NbS characteristics relate to public acceptance through a comparison with grey measures, and we identify influential acceptance factors related to individuals, society, and DRR measures. Based on the review, we introduce the PA-NbS model that highlights the role of risk perception, trust, competing societal interests, and ecosystem services. Efforts to increase acceptance should focus on providing and promoting awareness of benefits combined with effective communication and collaboration. Further research is required to understand interconnections among identified factors and how they can be leveraged for the success and further uptake of NbS.Supplementary InformationThe online version contains supplementary material available at 10.1007/s13280-021-01502-4. 相似文献
929.
Vega-Millán Christian B. Dévora-Figueroa Ana G. Burgess Jefferey L. Beamer Paloma I. Furlong Melissa Lantz R. Clark Meza-Figueroa Diana O´Rourke Mary Kay García-Rico Leticia Meza-Escalante Edna R. Balderas-Cortés José J. Meza-Montenegro Maria M. 《Environmental science and pollution research international》2021,28(26):34355-34366
Environmental Science and Pollution Research - Environmental arsenic exposure in adults and children has been associated with a reduction in the expression of club cell secretory protein (CC16) and... 相似文献
930.
Urban greening increases vegetation and can restore ecological functions to urban systems. It has ties to restoration ecology, which aims to return degraded land to diverse, functional ecosystems. Both practices can be applied to maximizing ecosystem services and habitat in vacant lots, which are abundant in post-industrial cities, including Chicago, Illinois (USA), where our study took place. We tested four methods for increasing native plant diversity in vacant lots, ranging from low input to resource-intensive: seed bombing, broadcast seeding, planting plugs, and gardening. After three growing seasons, we assessed the growth of eight target native species and all non-target species. We expected that intensive treatments would have more target species stems and flowers and fewer non-target species, but we found that less-intensive options often produce equal or better results. From this, we recommend broadcast seeding as a viable, low-cost method for improving habitat and biodiversity in vacant lots.Electronic supplementary materialThe online version of this article (10.1007/s13280-020-01383-z) contains supplementary material, which is available to authorized users. 相似文献