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To cope with climate change and achieve the dual carbon goal, China has actively promoted the implementation of carbon trading pilot policy, among which the power industry plays an important role in China’s carbon emission reduction work. The purpose of this paper is to study the influence of carbon trading policy on the energy efficiency of power industry and achieve the comprehensive goal of carbon emission reduction, carbon peak and carbon neutralization.

This paper constructs the difference-in-differences model based on 2012–2019 provincial data to study the impact of carbon trading policy on energy efficiency in the power industry and its effect path. Heterogeneity analysis was conducted to compare the effects of carbon trading policy in eastern, central and western regions as well as at different levels of power structures.

Carbon trading policy can significantly improve the energy efficiency of the power industry, and the policy effect is more significant in eastern and western regions and areas with high power structure. Mechanism analysis shows that carbon trading policy mainly influences the energy efficiency of power industry by environmental protection investment, power consumption demand and industrial structure.

This paper uses provincial panel data to deeply study the influence of carbon trading policy on energy efficiency of the power industry and its effect path. By constructing the difference-in-differences model, this paper empirically analyzes the governance effect of carbon trading policy. Meanwhile, it controls individual and time effects to solve the endogeneity problem prevalent in previous literature.

The smoothness of the high-speed railway (HSR) on the bridge may exceed the allowable standard when an earthquake causes vibrations for HSR bridges, which may threaten the safety of running trains. Indeed, few studies have evaluated the exceeding probability of rail displacement exceeding the allowable standard. The purposes of this article are to provide a method for investigating the exceeding probability of the rail displacement of HSRs under seismic excitation and to calculate the exceeding probability.

In order to investigate the exceeding probability of the rail displacement under different seismic excitations, the workflow of analyzing the smoothness of the rail based on incremental dynamic analysis (IDA) is proposed, and the intensity measure and limit state for the exceeding probability analysis of HSRs are defined. Then a finite element model (FEM) of an assumed HSR track-bridge system is constructed, which comprises a five-span simply-supported girder bridge supporting a finite length CRTS II ballastless track. Under different seismic excitations, the seismic displacement response of the rail is calculated; the character of the rail displacement is analyzed; and the exceeding probability of the rail vertical displacement exceeding the allowable standard (2mm) is investigated.

The results show that: (1) The bridge-abutment joint position may form a step-like under seismic excitation, threatening the running safety of high-speed trains under seismic excitations, and the rail displacements at mid-span positions are bigger than that at other positions on the bridge. (2) The exceeding probability of rail displacement is up to about 44% when PGA = 0.01g, which is the level-five risk probability and can be described as 'very likely to happen'. (3) The exceeding probability of the rail at the mid-span positions is bigger than that above other positions of the bridge, and the mid-span positions of the track-bridge system above the bridge may be the most hazardous area for the running safety of trains under seismic excitation when high-speed trains run on bridges.

The work extends the seismic hazardous analysis of HSRs and would lead to a better understanding of the exceeding probability for the rail of HSRs under seismic excitations and better references for the alert of the HSR operation.

Voluntary Partnership Agreement (VPA) offers a framework for open and participatory forest management for forest actors, particularly communities fringing forest reserves. This paper aimed to determine the factors influencing the participation of local communities in the implementation and monitoring of Forest Law Enforcement, Governance and Trade-Voluntary Partnership Agreement (FLEGT-VPA) activities.

The study was conducted in three communities in Goaso Forest District in the Ahafo Region of Ghana. Based on a cross-sectional design, 105 (n = 105) community members were interviewed using a semi-structured questionnaire. Logistic regression analysis was performed to identify socio-demographic and cultural factors that influence people's participation in FLEGT-VPA activities. Friedman and Wilcoxon signed-rank tests were conducted to analyse the influence of the environmental role of the forest and participation in FLEGT-VPA activities.

The study found a significant association between the leadership status of respondents' local customs/taboo days and participation in both implementation and monitoring activities. At the same time, a significant association was found between respondents' participation in previous training programs and FLEGT-VPA monitoring activities. The environmental role of the forest was also found to have a significant association with respondents' participation in FLEGT-VPA activities.

Studies on the factors that influence the participation of forest fringe communities in Ghana in implementing and monitoring FLEGT-VPA activities are non-existent or scarce. This study identified significant socio-demographic and environmental factors contributing to participatory forest conservation modules such as FLEGT-VPA which will guide future forest conservation initiatives that are inclusive of stakeholders’ interests/concerns.