Public Attitudes toward Climate Science and Climate Policy in Federal Systems: Canada and the United States Compared1

Multilevel governance poses several challenges for the politics of climate change. On the one hand, the unequal distribution of power and interests can serve as a barrier to implementing coherent policy at a federal level. On the other, these features also enable policy leadership among sub‐federal units. In the context of wide variation in climate policy at both national and sub‐federal levels in Canada and in the United States, this paper utilizes an original data set to examine public attitudes and perceptions toward climate science and climate change policy in two federal systems. Drawing on national and provincial/state level data from telephone surveys administered in the United States and in Canada, the paper provides insight into where the public stands on the climate change issue in two of the most carbon‐intensive federal systems in the world. The paper includes the first directly comparable public opinion data on how Canadians and Americans form their opinions regarding climate matters and provides insight into the preferences of these two populations regarding climate policies at both the national and sub‐federal levels. Key findings are examined in the context of growing policy experiments at the sub‐federal level in both countries and limited national level progress in the adoption of climate change legislation.     

A Study of Background Levels of Antimony,Barium, and Lead on Vehicle Surface Samples by Graphite Furnace Atomic Absorption

Law enforcement agencies routinely sample for gunshot residue (GSR) by bulk techniques and often submit swabs taken from other surfaces besides the hands of the suspect shooter. This study aims to establish the prevalence of antimony, barium, and lead on normally handled automobile surfaces by graphite furnace atomic absorption analysis. No positives were determined on 50 sampled automobile surfaces above cutoff (positive) from background levels. Transfers of GSR particles from shooter hands to automobile surfaces were found to potentially allow for positive GSR determinations, but such transfers seem to be dependent on the shooting conditions and length of GSR exposure. We determined that our bulk analysis method yields an overall 87.94 ± 5.52% extraction efficiency from cotton swabs, while the LOQ determinations strengthening the fact that bulk analysis methods are valid and valuable tools for GSR investigations.     

Fate and Behavior of Gunshot Residue: Recreational Shooter Vehicle Distribution

The susceptibility for recreational shooters to transfer gunshot residue (GSR) to both the interior and exterior of a vehicle is investigated. A comprehensive sampling protocol was used to assess the most likely areas of GSR transfer from recreational shooter contact, such as the steering wheel and the area, the firearms were stored (the trunk). Up to 315 characteristic GSR, particles were found in several locations throughout the interior of a vehicle. As many as 876 characteristic particles were found throughout a single vehicle. The data indicate that vehicles frequently occupied by firearms users are a potential source for inadvertent transfer of GSR to persons unrelated to firearm activity. In criminal cases where vehicles have been used, such transfer processes for GSR need to be considered within the context of any case interpretation. The implications for subsequent contamination and transfer processes from such vehicles require further investigation.     

三七中人参炔醇的提取、分离和鉴定

目的:提取、分离和鉴定三七中人参炔醇.方法:采用超临界CO2萃取三七脂溶性成分,硅胶柱层析、制备薄层分离,并通过波谱技术(UV、IR、MS、1HNMR、13CNMR)分析鉴定人参炔醇化学结构.结果:从三七中分离并鉴定了人参炔醇成分,得率为0.077%.结论:应用超临界CO2萃取三七中脂溶性成分并分离其中的人参炔醇,得率较高.     

The Politics of the British Environment since 1945

This article examines, first, how environmental concerns have shaped British politics since 1945, making the environment an object of governance; and second, how political developments have an environmental history, focussing on the environmental demands of social democracy. It contends that environmentalism should be considered alongside other political ideologies, such as socialism and feminism, as helping to constitute the modern British state and the evolving relationship between government and the citizen. It considers how the management of the terrestrial environment became a hotly contested matter in the postwar decades, drawing a distinction between the politics of ‘landscape preservation’ and ‘nature conservation’. This discussion is related to access politics and questions of rural governance and regulation, particularly with respect to the agricultural sector. The article concludes with a discussion of some current environmental concerns, reflecting on the possible transition from today's ‘carbon democracy’ to tomorrow's ‘renewable democracy’.     

中国“碳金融”发展的制约因素及路径选择

“碳金融”是环保项目投融资的代名词,是国际金融界的新课题,泛指减少温室气体排放的各种金融制度安排和金融交易活动,主要包括碳排放权及其衍生品的交易和投资、低碳项目开发的投融资以及其他相关的金融中介活动。中国“碳金融”市场发展前景广阔,银行业开展“碳金融”业务不仅可以推动经营战略转型,提升国际竞争力,而且可以促进中国经济健康发展。该文简要介绍“碳金融”发展的背景、意义及国内外“碳金融”发展现状,分析了中国“碳金融”发展的制约因素,提出中国“碳金融”发展的路径。     

Why did Argentina and Uruguay decide to pursue a carbon tax? Fiscal reforms and explicit carbon prices

Since 2014, carbon taxes have been spreading in South America. Counterintuitively, while they are primarily considered climate policies, their adoption has been largely driven by causes unrelated to the reduction of greenhouse gas emissions. The carbon tax policymaking literature has overlooked the causes that trigger the causal mechanisms for adopting carbon taxes and has instead centered on parts of the causal mechanism. Focusing on the very beginning of the process, namely the causes triggering the decision to pursue carbon taxes in Argentina and Uruguay, this study both contributes to the carbon tax policymaking literature and to the burgeoning application of logical Bayesian analysis in qualitative studies. According to previous studies, the pursuit of carbon taxes inherently entails political challenges linked, among others, to its potential regressive impacts and effects on industries, which makes the sudden rise of carbon taxes in Argentina and Uruguay surprising. Based on 26 expert interviews and a desk review, the study applies a logical Bayesian analysis to study potential causes structured around mutually exclusive hypotheses consistent with the carbon tax policymaking literature. It shows that the causes for pursuing carbon taxes in Argentina and Uruguay are not primarily related to mitigation. Instead, Argentina conceived carbon taxation as part of a broader reform of its fiscal system, and Uruguay as a way to make explicit the already high implicit carbon price.     

Electrical Pulse Generated Upon Discharging a Firearm and Its Implication for Gunshot Residue Analysis

Ammunition primers consisting of a mixture of lead styphnate, barium nitrate, and antimony (III) sulfide, upon deflagration, lead to the formation of inorganic gunshot residue (GSR). The cations, from their predeflagration form, undergo reduction reactions during burning to form the classic spheroidal, micron-sized particles indicative of GSR. However, the rapidly changing pressure and temperature of the reaction zone implies that the reactions cannot go to completion. In this study, we use a conductivity detector to show that GSR produces an electrical pulse which corroborates the incomplete redox chemistry. We find that the shape of some GSR formed in an electric field also suggests its nonneutral character. Tantalizingly, the formation of GSR might be a result of Coulombic repulsion shattering the molten droplets in to smaller spheroids. Lastly, we suggest that deposition or transfer of GSR could be influenced by static electricity, an area which should be further studied.     

Particle Analysis for the Detection of Gunshot Residue (GSR) in Nasal Samples Using Scanning Laser Ablation and Inductively Coupled Plasma-Mass Spectrometry (SLA-ICPMS)

Currently, aluminum stub with carbon adhesive devices are used to collect inorganic gunshot residues (GSR) from the hands of a shooter. In an ideal shooting case, the gunshot particles do not persist for more than 2 h in the hands of the shooter, provided that the hands have not been washed. However, for forensic analysis and inference, the extended persistence of GSR would be desirable. This study investigates a novel GSR sampling and detection protocol. Sampling was performed in the nostrils using swab devices impregnated in ethylenediaminetetraacetic acid (EDTA). The GSRs persisted for longer periods in nasal mucus than on the hands, and particles were detected 6 h after shooting occurred. The analytical determination was conducted by scanning laser ablation-inductively coupled plasma-mass spectrometry (SLA-ICPMS) which enable the identification of the number of particles and their elemental composition. Seventeen isotope signals corresponding to ¹³C, ²⁰⁵Tl and 15 analytes that are usually associated with the composition of GSR residues were monitored: ²⁷Al, ²⁹Si, ³¹P, ³³S, ³⁵Cl, ³⁹K, ⁴⁴Ca, ⁵⁷Fe, ⁶⁰Ni, ⁶³Cu, ⁶⁶Zn, ¹¹⁸Sn, ¹²¹Sb, ¹³⁷Ba, and ²⁰⁸Pb. The SLA technique enabled the reduction of the swab analysis time to 40 min. The effectiveness of this methodology was evaluated with two types of firearms: a pistol and a shotgun. The results indicated that the methodology proposed for the analysis of the nasal GSR was effective and that it can improve or complement the forensic analyses and inferences presented in a court.     

Cheikh Anta Diop: The social sciences,humanities, physical and natural sciences and transdisciplinarity

ABSTRACT

This article presents a critical exposition of the contributions of Cheikh Anta Diop to a scientific understanding of ancient African history, race, and the study of culture. It sets out the history of Diop's successful struggle against flawed Eurocentric scholarship which sought to deny the contributions of ancient black Egyptians to world civilisation. Diop's intellectual odyssey across physics, linguistics, through anthropology, ethnology, genetics and history is recounted here to demonstrate the limitations of mono-, inter- and multidisciplinarity and clearly identifies him as a pioneer of transdisciplinarity in the field of knowledge production.