全文获取类型
收费全文 | 25855篇 |
免费 | 240篇 |
国内免费 | 159篇 |
专业分类
安全科学 | 541篇 |
废物处理 | 1066篇 |
环保管理 | 3315篇 |
综合类 | 4334篇 |
基础理论 | 6913篇 |
环境理论 | 13篇 |
污染及防治 | 5804篇 |
评价与监测 | 1775篇 |
社会与环境 | 2341篇 |
灾害及防治 | 152篇 |
出版年
2022年 | 169篇 |
2021年 | 203篇 |
2020年 | 138篇 |
2019年 | 184篇 |
2018年 | 766篇 |
2017年 | 776篇 |
2016年 | 866篇 |
2015年 | 416篇 |
2014年 | 568篇 |
2013年 | 1790篇 |
2012年 | 846篇 |
2011年 | 1517篇 |
2010年 | 1051篇 |
2009年 | 1155篇 |
2008年 | 1407篇 |
2007年 | 1668篇 |
2006年 | 868篇 |
2005年 | 776篇 |
2004年 | 731篇 |
2003年 | 782篇 |
2002年 | 741篇 |
2001年 | 752篇 |
2000年 | 580篇 |
1999年 | 310篇 |
1998年 | 266篇 |
1997年 | 246篇 |
1996年 | 251篇 |
1995年 | 284篇 |
1994年 | 265篇 |
1993年 | 255篇 |
1992年 | 260篇 |
1991年 | 252篇 |
1990年 | 266篇 |
1989年 | 223篇 |
1988年 | 186篇 |
1987年 | 166篇 |
1986年 | 195篇 |
1985年 | 192篇 |
1984年 | 210篇 |
1983年 | 190篇 |
1982年 | 198篇 |
1981年 | 194篇 |
1980年 | 188篇 |
1979年 | 185篇 |
1978年 | 129篇 |
1977年 | 145篇 |
1974年 | 133篇 |
1973年 | 121篇 |
1972年 | 140篇 |
1971年 | 110篇 |
排序方式: 共有10000条查询结果,搜索用时 281 毫秒
1.
Russian Journal of Ecology - A new method for assessing the response of biota to climatic changes in the ecosystem has been tested. In the Central Forest Natural Biosphere Reserve, the average... 相似文献
2.
Lyons Kady Wynne-Edwards Katherine E. 《Environmental science and pollution research international》2021,28(22):27493-27510
Environmental Science and Pollution Research - Organic contaminants are known to affect a suite of physiological processes across vertebrate clades. However, despite their ancient lineage and... 相似文献
3.
Petrov I. A. Shushpanov A. S. Golyukov A. S. Dvinskaya M. L. Kharuk V. I. 《Russian Journal of Ecology》2021,52(5):399-405
Russian Journal of Ecology - Climate change entails shifts in the ranges of woody plants along both latitudinal and altitudinal gradients in the boreal forest biome. In this study,... 相似文献
4.
Chinazaekpere Nwani Festus V. Bekun Bright A. Gyamfi Ekpeno L. Effiong Andrew A. Alola 《Natural resources forum》2023,47(2):155-176
Sustainable use of natural resources would entail ensuring that derived economic benefits today do not undermine the welfare of generations to come. On this basis, this study examines the nexus between natural resource rents and carbon dioxide (CO2) emissions disaggregated into production and consumption-based (i.e., trade-adjusted) CO2 emissions for a selected panel of 45 developing and transition economies over the period 1995–2017. The empirical model also incorporates the impacts of population, affluence, and energy intensity. The results show that affluence increases production-based CO2 emissions by 1.407%, with the EKC's predicted inverted U-shaped curve only explaining consumption-based CO2 emissions. Economic reliance on natural resource rents and energy intensification contribute 0.022% and 0.766%, respectively, to CO2 emissions embedded in territorial production inventories and 0.035% and 0.583%, respectively, to CO2 emissions embedded in consumption inventories. The bootstrap non-causality test shows that historical data on each variable has significant predictive power for future CO2 emissions from both sources. The historical information about natural resource rents has significant predictive power over the future levels of affluence and energy intensity. Clearly, the results show that the environmental impact of natural resource rents is stronger when CO2 emissions are adjusted for trade and varies among the countries, with Bangladesh, Guinea, India, Malaysia, Mexico, Nigeria, Pakistan, Saudi Arabia, Vietnam, and Zimbabwe among the most affected countries. Overall, this study provides motivation for policies to keep the use of natural resources within sustainable limits. 相似文献
5.
Nicholas J. Georgiadis Joel E. Baker 《Journal of the American Water Resources Association》2023,59(5):970-983
In Pacific Northwest streams, summer low flows limit water available to competing instream (salmon) and out-of-stream (human) uses, creating broad interest in how and why low flows are trending. Analyses that assumed linear (monotonic) change over the last ~60 years revealed declining low flow trends in minimally disturbed streams. Here, polynomials were used to model flow trends between 1929 and 2015. A multidecadal oscillation was observed in flows, which increased initially from the 1930s until the 1950s, declined until the 1990s, and then increased again. A similar oscillation was detected in precipitation series, and opposing oscillations in surface temperature, Pacific Decadal Oscillation, and Interdecadal Pacific Oscillation series. Multidecadal oscillations with similar periods to those described here are well known in climate indices. Fitted model terms were consistent with flow trends being influenced by at least two drivers, one oscillating and the other monotonic. Anthropogenic warming is a candidate driver for the monotonic decline, and variation in (internal) climatic circulation for the oscillating trend, but others were not ruled out. The recent upturn in streamflows suggests that anthropogenic warming has not been the dominant factor driving streamflow trends, at least until 2015. Climate projections based on simulations that omit drivers of multidecadal variation are likely to underestimate the range, and rate of change, of future climatic variation. 相似文献
6.
Assessment of aquatic macroinvertebrates is a critical component of many watershed monitoring programs and passive samplers are often used to collect long-term site data, especially in environments where active sampling is not possible. However, standard passive samplers can be expensive and lost in extreme conditions. We developed a sampler using plastic soda bottles (PSB) filled with river rock and compared its effectiveness with standard Hester-Dendy samplers in both lotic and lentic environments. Abundance, taxa richness, and macroinvertebrate composition showed no significant differences between sampler types in either habitat type. PSB samplers, which can be constructed for less than one dollar each, collected the same number of organisms and represented the same diversity as Hester-Dendy devices that cost around $38 each. In studies where funds are limited, PSB samplers appear to be suitable for passive monitoring. 相似文献
7.
Fedorov N. I. Martynenko V. B. Zhigunova S. N. Mikhailenko O. I. Shendel’ G. V. Naumova L. G. 《Russian Journal of Ecology》2021,52(2):118-125
Russian Journal of Ecology - Changes in the distribution of broadleaf tree species—Tilia cordata Mill., Quercus robur L., Acer platanoides L., and Ulmus glabra Huds.—in the central part... 相似文献
8.
Russian Journal of Ecology - The dynamics of the species richness, breeding density, and structure of the community of birds occupying nest-boxes upon a 50-fold reduction of atmospheric emissions... 相似文献
9.
Zadubrovskiy P. A. Vasina A. V. Novikova E. V. Kondratyuk E. Yu. Matskalo L. L. Novikov E. A. 《Russian Journal of Ecology》2021,52(4):283-289
Russian Journal of Ecology - To test the hypothesis that animals from habitats exposed to high anthropogenic pressure are more successful in adapting to captivity, immature narrow-skulled voles... 相似文献
10.
Carvalho Laíse M. Soares-Filho Antônio F. Lima Maciel S. Cruz-Filho João F. Dantas Taisa C. M. Luz Geraldo E. 《Environmental science and pollution research international》2021,28(7):7774-7785
Environmental Science and Pollution Research - A current environmental problem is the uncontrolled use of various pesticides that are harmful to the environment and public health. The herbicide... 相似文献