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101.
Åihman Markus Zetterberg Lars 《Mitigation and Adaptation Strategies for Global Change》2005,10(4):597-645
The article investigates four alternative allocation schemes for emission allowances. The investigated schemes are emission-based
allocation, production-based allocation with actor-specific emission factors, production-based allocation with benchmarking
and production-based allocation based on data on best available technology (BAT). All the examined schemes apply free allocation
based on historical activities. The allocation schemes are evaluated against the criteria for a National Allocation Plan,
listed in the Annex III of the EU ETS Directive, and regarding their conformity with the criteria put forward by the Swedish
Parliamentary Delegation on Flexible Mechanisms, The FlexMex 2 Commission.
No allocation scheme unambiguously meets all criteria. Each has its advantages and disadvantages. Emission-based allocation
schemes are most straightforward, transparent and are the easiest to implement.
Production-based allocation schemes meet more of the criteria, but are more costly to implement and require more data. Data
on BAT will not be available to the extent necessary in order to base an allocation scheme implemented for the trading starting
2005 on BAT. It is unlikely that any given allocation scheme will be perceived as fair by all concerned parties, no matter
how sophisticated it is. The overall characteristics of the studied allocation schemes are summarised in the paper. Due to
the lack of abatement cost curves, it is not possible to accurately model capital flows between the trading sectors. Data
availability will most probably limit the options available to the authorities designing the allocation schemes.
An erratum to this article is available at . 相似文献
102.
103.
104.
Impacts of land cover change on plant and bird species diversity in Hainan Island,China 总被引:2,自引:0,他引:2
1IntroductionLandcoverchangehasanincreasingimpactonforestecosystemsworldwide.Thedestructionofnativehabitatsisrecognizedasoneo... 相似文献
105.
106.
Vulturius Gregor André Karin Swartling Åsa Gerger Brown Calum Rounsevell Mark D. A. Jönsson Anna Maria Blanco Victor 《Regional Environmental Change》2018,18(5):1571-1571
Regional Environmental Change - The published online version contains mistake. Anna Maria Jönsson was inadvertently omitted in the author group section. Correct author group section is shown... 相似文献
107.
Adequate temporal trend analysis of mercury (Hg) in freshwater ecosystems is critical to evaluate if actions from the human society have affected Hg concentrations ([Hg]) in fresh water biota. This study examined temporal change in [Hg] in Northern pike (Esox lucius L.) in Swedish freshwater lakes between 1994 and 2006. To achieve this were lake-specific, multiple-linear-regression models used to estimate pike [Hg], including indicator variables representing time and fish weight and their interactions. This approach permitted estimation of the direction and magnitude of temporal changes in 25 lakes selected from the Swedish national database on Hg in freshwater biota. A significant increase was found in 36% of the studied lakes with an average increase in pike [Hg] of 3.7 ± 6.7% per year that was found to be positively correlated with total organic carbon. For lakes with a significant temporal change the dataset was based on a mean of 30 fish, while for lakes with no temporal change it was based on a mean of 13 fish. 相似文献
108.
Many chemicals in use today lack appropriate documentation on their environmental properties, fate, and effects. To counteract this lack of documentation it is vital to thoroughly investigate a compound’s fate in the environment before it comes into use. The present study is describing a novel method for assessing the reduction potential of polybrominated diphenyl ethers (PBDEs), as a part of a project aimed to create an experimental model for determination of chemical persistence. The reductive transformation of 15 PBDE congeners using sodium borohydride was determined. Pseudo-first-order reaction rate constants of the transformations were determined by monitoring the disappearance of the investigated congeners. The reductions lead primarily to formation of lower brominated PBDEs. Each PBDE congener was tested in a total of ten replicates which showed a relative standard deviation of 31% or less. The decaBDE, BDE-209 was approximately 3 times as prone to reductive transformation as BDE-207. The three nonaBDEs, BDE-206, BDE-207, and BDE-208, showed similar reductive potential. The reactivity of the tested octaBDEs was quite variable, from 5% to 24% of the reactivity of BDE-209 for BDE-196 and BDE-198, respectively. The heptaBDEs studied were in the range of the less reactive octaBDEs, except for BDE-181 which was as high as 13% of the reactivity of BDE-209. The results presented give a method for measuring the propensity of PBDEs, and possibly similar compounds, to undergo reductions. They indicate a potential route to a vital piece of information in the assessment of environmental persistence of chemicals. 相似文献
109.
青弋江流域不同级别河流底栖动物群落结构研究 总被引:2,自引:0,他引:2
2013年8月对青弋江流域不同级别河流底栖动物进行了调查。共采集到底栖动物60种,隶属于39科58属。从1级到4级河流,种类数表现出逐渐减少的趋势,分别为46、39、36和16种。1~3级河流中种类数最多的均是水生昆虫,4级河流中种类数最多的是软体动物。整个流域底栖动物密度和生物量分别为382 ind./m2和3643 g/m2。不同级别河流中,2级河流底栖动物密度最大,4级河流密度最小,且二者存在显著差异;2级和4级河流底栖动物生物量都较高,且显著高于1级河流。在功能摄食类群方面,整个流域以刮食者和过滤收集者为主。随着河流级别的增加,刮食者相对密度和相对生物量表现出先增加后下降的趋势;撕食者在1、2级河流所占比例较高;直接收集者和过滤收集者在1级和4级河流中所占比例较高 相似文献
110.
Åke Sjödin David A. Cooper Kenth Andréasson 《Journal of the Air & Waste Management Association (1995)》2013,63(3):186-190
Abstract Ambient air measurements of N2O, NOx, CO, and HC based on grab sampling were conducted in a major traffic tunnel in Sweden, that carries up to 4,000 vehicles per hour, in order to estimate real-world emissions of N2O for road traffic. Two different methods—relative and mass balance—were used to calculate a N2O emission factor for the mixed vehicle fleet, which gave an average emission factor, at average speeds of 30-70 km/h, of approximately 25 mg N2O/ km, with a range of 7-56 mg/km. 相似文献