全文获取类型
收费全文 | 47670篇 |
免费 | 1249篇 |
国内免费 | 5820篇 |
专业分类
安全科学 | 2200篇 |
废物处理 | 2260篇 |
环保管理 | 5502篇 |
综合类 | 16832篇 |
基础理论 | 9906篇 |
环境理论 | 9篇 |
污染及防治 | 12640篇 |
评价与监测 | 2441篇 |
社会与环境 | 2098篇 |
灾害及防治 | 851篇 |
出版年
2023年 | 375篇 |
2022年 | 1029篇 |
2021年 | 936篇 |
2020年 | 801篇 |
2019年 | 698篇 |
2018年 | 1036篇 |
2017年 | 1112篇 |
2016年 | 1309篇 |
2015年 | 1376篇 |
2014年 | 1977篇 |
2013年 | 3975篇 |
2012年 | 2261篇 |
2011年 | 2692篇 |
2010年 | 2216篇 |
2009年 | 2318篇 |
2008年 | 2512篇 |
2007年 | 2341篇 |
2006年 | 2128篇 |
2005年 | 1635篇 |
2004年 | 1498篇 |
2003年 | 1476篇 |
2002年 | 1381篇 |
2001年 | 1490篇 |
2000年 | 1282篇 |
1999年 | 915篇 |
1998年 | 695篇 |
1997年 | 721篇 |
1996年 | 674篇 |
1995年 | 679篇 |
1994年 | 587篇 |
1993年 | 525篇 |
1992年 | 496篇 |
1991年 | 456篇 |
1990年 | 465篇 |
1989年 | 409篇 |
1988年 | 339篇 |
1987年 | 313篇 |
1986年 | 319篇 |
1985年 | 306篇 |
1984年 | 362篇 |
1983年 | 312篇 |
1982年 | 355篇 |
1981年 | 340篇 |
1980年 | 272篇 |
1979年 | 306篇 |
1978年 | 223篇 |
1977年 | 220篇 |
1974年 | 219篇 |
1973年 | 216篇 |
1967年 | 238篇 |
排序方式: 共有10000条查询结果,搜索用时 296 毫秒
11.
Conservation conflicts are gaining importance in contemporary conservation scholarship such that conservation may have entered a conflict hype. We attempted to uncover and deconstruct the normative assumptions behind such studies by raising several questions: what are conservation conflicts, what justifies the attention they receive, do conservation-conflict studies limit wildlife conservation, is scientific knowledge stacked against wildlife in conservation conflicts, do conservation-conflict studies adopt a specific view of democracy, can laws be used to force conservation outcomes, why is flexibility needed in managing conservation conflicts, can conservation conflicts be managed by promoting tolerance, and who needs to compromise in conservation conflicts? We suggest that many of the intellectual premises in the field may defang conservation and prevent it from truly addressing the current conservation crisis as it accelerates. By framing conservation conflicts as conflicts between people about wildlife or nature, the field insidiously transfers guilt, whereby human activities are no longer blamed for causing species decline and extinctions but conservation is instead blamed for causing social conflicts. When the focus is on mitigating social conflicts without limiting in any powerful way human activities damaging to nature, conservation-conflict studies risk keeping conservation within the limits of human activities, instead of keeping human activities within the limits of nature. For conservation to successfully stop the biodiversity crisis, we suggest the alternative goal of recognizing nature's right to existence to maintenance of ecological functions and evolutionary processes. Nature being a rights bearer or legal person would imply its needs must be explicitly taken into account in conflict adjudication. If, even in conservation, nature's interests come second to human interests, it may be no surprise that conservation cannot succeed. 相似文献
12.
Wildlife provides food, medicine, clothing, and other necessities for humans, but overexploitation can disrupt the sustainability of wildlife resources and severely threaten global biodiversity. Understanding the characteristics of consumer behavior is helpful for wildlife managers and policy makers, but the traditional survey methods are laborious and time-consuming. In contrast, culturomics may more efficiently identify the features of wildlife consumption. As a case study of the culturomics approach, we examined tiger bone wine consumption in China based on social media and Baidu search engine data. Tiger bone wine is one of the most purchased tiger products; its consumption is closely related to tiger poaching, which greatly threatens wild tiger survival. We searched a popular social media website for the term “tiger bone wine” and focused on posts that were originally created from 1 January 2012 to 31 December 2018. We filtered and classified posts related to the purchase, sale, or consumption of tiger bone wine and extracted information on providers, consumption motivations, year of production, and place of origin of the tiger bone wines based on the texts and photos of these posts. We found 756 posts related to tiger bone wine consumption, 113 of which mentioned providers of tiger bone wine, including friends (53%), elder relatives (37%), peer relatives (7%), and others (3%). Out of the 756 posts, 266 indicated the motivations of tiger bone wine consumption. Tiger bone wines were consumed as a tonic (34%), medicine (23%), game product (30%), and a symbol of wealth (28%). Some posts indicated ≥2 consumption motivations. These findings were consistent with the search queries from Baidu index. Such information could help develop targeted strategies for tiger conservation. The culturomics approach illustrated by our study is a rapid and cost-efficient way to characterize wildlife consumption. 相似文献
13.
Cao Li Li Lin Wu Yi 《Environmental science and pollution research international》2021,28(3):2765-2778
Environmental Science and Pollution Research - China is the most populous country in the world, and the pollution caused by the excessive population should not be underestimated. In recent years,... 相似文献
14.
15.
Tang Zhi Li Yilian Yang Zhe Liu Danqing Tang Min Yang Sen Tang Ye 《Environmental science and pollution research international》2019,26(20):20277-20285
Environmental Science and Pollution Research - The sorption/desorption behaviors of benzene, toluene, ethylbenzene, and xylene (BTEX) on soil organic matter (SOM) have a significant influence on... 相似文献
16.
Pham Thanh-Luu Tran Thi Hoang Yen Shimizu Kazuya Li Qintong Utsumi Motoo 《Environmental science and pollution research international》2021,28(45):63544-63557
Environmental Science and Pollution Research - Toxic cyanobacterial blooms (TCBs) have become a growing concern worldwide. The present study investigated the dynamic of toxic cyanobacteria and... 相似文献
17.
18.
19.
20.