Promoting sustainable consumption and circular economy:the intention of Vietnamese youth consumers to purchase products made from recycled plastics

Recycling is viewed as a key component in a circular economy and serves as an ideal solution for promoting sustainability.During the global plastic crisis,plastic recycling practices have been adopted worldwide,leading to the production of various products made from recycled plastics(PRP).Nevertheless,a gap persists between consumption and demand for such products,which is primarily attributed to a lack of comprehension from the consumer perspective.Given the pivotal role consumers play in the adoption of these products,this study explores consumers’intentions to purchase PRP.This is particularly significant in Vietnam,which is an emerging economy aspiring to achieve the objectives of a circular economy and sustainable development.Utilizing an integrated cognitive-emotional framework comprising the Valence Theory and the Norm Activation Model,data from 564 Vietnamese students were gathered and analyzed using structural equation modeling.The results show that awareness of consequences is a major driver of consumer purchase intentions,followed by perceived ease of application and monetary incentives.The results also indicate that health concerns have the strongest effect on purchase intention and in the negative side,meaning that the health-related risk is the primary concern for consumers during the decision-making process.This research holds substantial value for academics and managers,as it aids in the theoretical exploration and the formulation of strategies to improve consumer acceptance of PRP.

Encouraging circular economy and sustainable environmental practices by addressing waste management and biomass energy production

The current linear economy assumes abundant,easily accessible,and cost-effective natural resources.However,this assumption is unsustainable,especially considering the world’s current trajectory exceeding the Earth’s ecological limits.In contrast,circular economy(CE)reduces wastes and improves resource efficiency,making them a more sustainable alternative to the dominant linear model.Biomass energy generated from agricultural leftovers,forestry wastes,and municipal trash provides a renewable substitute for fossil fuels.This reduces greenhouse gas emissions and improves energy security.Proper waste management,including trash reduction,recycling,and innovative waste-to-energy technology,reduces the burden on landfills and incineration and creates renewable energy from materials that would otherwise go to waste.Although integrating these techniques is consistent with the CE’s resource efficiency and waste minimization principles,it requires addressing environmental,technical,and socioeconomic challenges.Given the pressing global issues,transitioning to a CE and implementing sustainable environmental practices are crucial to mitigate the current waste management crisis.The aim of this study is to emphasize the viability of biomass as a source of sustainable energy,the necessity of comprehensive strategies that prioritize ecological sustainability,community involvement,and innovation to achieve a circular principle based future,and the potential obstacles to the implementation of sustainable environmental practices.This study will aid in implementing CE practices to accomplish the Sustainable Development Goals(SDGs)by reducing greenhouse gas emissions and landfill loads.Beyond environmental benefits,it can also bring economic,social,and health improvements.Furthermore,this study will assist societies in addressing global issues,such as resource scarcity,pollution,and climate change,as well as transitioning to a more sustainable and resilient future.

An Integrated Building Information Modeling (BIM) and Circular Economy (CE) Model for the Management of Construction and Deconstruction Waste Based on Construction Methods

As the climate change signs become more noticeable, the concern to prioritize sustainability within the AEC industry intensifies. This particularly pertained to issues related to the demand of resources, the excessive consumption of raw materials, and the associated generated waste. Presently, the construction industry is ranked among the industries that are accountable for the global generation of solid waste and energy consumption, leading to detrimental environmental effects. Nonetheless, over the years, construction methods, technological innovations, and building practices have made considerable progress, influenced by a growing emphasis on sustainability, especially in energy conservation and in adopting the Industrialized Production layer of Construction 4.0 (i.e., modular prefabrication, 3D concrete printing, and BIM). The concept of Circular Economy (CE) has been identified as a potential solution to achieve sustainability in building construction through the design, construction, and end-of-life deconstruction processes that enhance the management of waste based on the framework that is related to reducing, reusing, and recycling. Moreover, information and data related to geolocation complement advanced digital technologies by providing a collaborative platform that supports the application of CE as a practical approach to sustainability. Thus, this study will provide a straightforward methodology for developing a model that integrates BIM and sustainable design with Circular Economy’s concept to enhance the sustainability of construction projects to minimize their waste based on various construction methods (i.e., conventional, modular, and 3D concrete printing). The proposed model interrelates tools and data for the evaluation and planning strategies for the construction and deconstruction waste (CDW) management at the design stage, including estimating the quantities of the wasted materials, quantifying the production rates of selected equipment for the waste handling (loading and hauling) at the various stages of a project as well their associated cost. The proposed model will help users to calculate the quantity of construction and deconstruction waste (CDW) during the design of buildings based on their different construction methods at the early stage by using the concept of Design for Deconstruction (DfD);sustainable construction methods;and deconstruction process for waste management, which will lead to the suitable construction method.

Carbon Capture Technologies in OAPEC Member Countries and the Circular Carbon Economy: A Roadmap to Zero Emissions by 2050

Several Organization of Arab Petroleum Exporting Countries (OAPEC) member states (OMSs) have updated their nationally determined contributions (NDCs) with the aim of achieving zero carbon emissions by 2050. Carbon neutrality requires shifting from a linear carbon economy (LCE) to a circular carbon economy (CCE). Carbon capture and storage (CCS) technologies, including reduction, recycle, reuse, removal, and storage technologies, represent an important strategy for achieving such a shift. Herein, we investigate the effects of CCS technology adoption in six OMSs—namely the Kingdom of Saudi Arabia (KSA), Qatar, the United Arab Emirates (UAE), Kuwait, Algeria, and Iraq—by examining their Circular Carbon Economy Index (CCEI) scores, which reflect compliance with CCE-transition policies. Total CCEI, current performance CCEI dimension, and future enabler CCEI dimensions scores were compared among the aforementioned six OMSs and relative to Norway, which was used as a global-high CCEI reference standard. Specifically, CCEI general scope and CCEI oil scope dimension scores were compared. The KSA, Qatar, the UAE, and Kuwait had higher CCEI scores than Algeria and Iraq, reflecting their greater adoption of CCE-transition policies and greater emission-reducing modernization investments. The current performance CCEI scores of Algeria and Iraq appear to be buttressed to some extent by their greater natural carbon sink resources. Based on the findings, we recommend specific actions for OMSs to enhance their CCE transitions and mitigate the negative impacts associated with the associated investments, including: taking rapid practical steps to eliminate carbon oil industry emissions;detailed CCS planning by national oil companies;international cooperation and coordination;and increased investment in domestic CCS utilization infrastructure.

Valorization of Agricultural Residues for Hydrogen-Based Electricity Generation towards Circular Bioeconomy

Global crises, notably climate shocks, degraded ecosystems, and growing energy demand, enforce sustainable production and consumption pathways. A circular bioeconomy offers the opportunities to actualize resource and eco-efficiency enhancement, valorization of waste streams, reduction of fossil energy and greenhouse gas (GHG) emissions. Albeit biomass resources are a potential feedstock for bio-hydrogen (bio-H2) production, Ghana’s agricultural residues are not fully utilized. This paper examines the economic and environmental impact of bio-H2 electricity generation using agricultural residues in Ghana. The bio-H2 potential was determined based on biogas steam reforming (BSR). The research highlights that BSR could generate 2617 kt of bio-H2, corresponding to 2.78% of the global hydrogen demand. Yam and maize residues contribute 50.47% of the bio-H2 produced, while millet residues have the most negligible share. A tonne of residues could produce 16.59 kg of bio-H2 and 29.83 kWh of electricity. A total of 4,705.89 GWh of electricity produced could replace the consumption of 21.92% of Ghana’s electricity. The economic viability reveals that electricity cost is $0.174/kWh and has a positive net present value of $2135550609.45 with a benefit-to-cost ratio of 1.26. The fossil diesel displaced is 1421.09 ML, and 3862.55 kt CO2eq of carbon emissions decreased corresponding to an annual reduction potential of 386.26 kt CO2eq. This accounts for reducing 10.26% of Ghana’s GHG emissions. The study demonstrates that hydrogen-based electricity production as an energy transition is a strategic innovation pillar to advance the circular bioeconomy and achieve sustainable development goals.

Research on Comparative Advantage and Typical Models of Circular Agriculture Economy in Eastern and Mid-China Region

Developing agricultural circular economy is the important measures of relieving the pressure on agricultural resources, preserving the ecological environment and promoting the sustainable development of agriculture and rural economy. Based on the idea of circulation of agricultural research as the breakthrough point, the research firstly detailed the concept and scientific connotation of circular egdculture in an all-round way and described and analyzed the advantages and conditions of the development of circular agriculture in eastern and middle regions of China from three aspects including resources endowment, conditions of economic development and industrial base conditions. Furthermore, the research analyzed the model char- actedstics and summarized the successful ex^dence to provide a reference for promoting the models with consideration of Taihu Lake Basin in South of Jiangsu, Yi- meng mountain areas in Southeast of Shandong and hills and mountains region in northwest Henan. Finally, the reseach put forward the development orientation of agricultural circular economy and countermeasures and suggestions to further enhance the level of development.

Construction of Eco-agricultural Tourist Product Mode from the Perspective of Circular Economy

Concepts and connotations of circular economy and eco-agricultural tourism were introduced,and feasibility of applying circular economy in eco-agricultural tourism was further studied.It was stressed that development of eco-agricultural tourism complies with the theme of resource recycling,moreover,both eco-agricultural tourist products and circular economy value environment protection,and target at the win-win of ecological and economic benefits.From the perspective of circular economy,the construction of eco-agricultural tourist product mode was studied,construction of eco-agricultural tourist areas,catering and accommodation areas and traffic construction of eco-agricultural scenic areas were discussed.The study stressed that connotations of circular economy can be used to restrain eco-agricultural tourism,and realize recycling and sustainable development of resources.

Waste-Derived Catalysts for Water Electrolysis:Circular Economy-Driven Sustainable Green Hydrogen Energy

The sustainable production of green hydrogen via water electrolysis necessitates cost-effective electrocatalysts.By following the circular economy principle,the utilization of waste-derived catalysts significantly promotes the sustainable development of green hydrogen energy.Currently,diverse waste-derived catalysts have exhibited excellent catalytic performance toward hydrogen evolution reaction(HER),oxygen evolution reaction(OER),and overall water electrolysis(OWE).Herein,we systematically examine recent achievements in waste-derived electrocatalysts for water electrolysis.The general principles of water electrolysis and design principles of efficient electrocatalysts are discussed,followed by the illustration of current strategies for transforming wastes into electrocatalysts.Then,applications of waste-derived catalysts(i.e.,carbon-based catalysts,transitional metal-based catalysts,and carbon-based heterostructure catalysts)in HER,OER,and OWE are reviewed successively.An emphasis is put on correlating the catalysts’structure-performance relationship.Also,challenges and research directions in this booming field are finally highlighted.This review would provide useful insights into the design,synthesis,and applications of waste-derived electrocatalysts,and thus accelerate the development of the circular economy-driven green hydrogen energy scheme.

Sustainable manufacturing,life cycle thinking and the circular economy

Achieving sustainable patterns of consumption and production is perhaps the biggest challenge facing our society today. The de-mand for more safe environmentally benign products is rising and many companies are looking for new ways to progressively improve the sus-tainability of their products. Moreover, there are numerous opportunities and countless innovations, technological as well as non-technologi-cal,that need to be exploited to improve the sustainability of products. Manufacturing industry is an important sector of any economy and hasthe potential to become a driving force for enabling sustainable patterns of production and consumption through introducing efficient productionpractices and developing products and services that help reduce environmental impacts. The benefits of adopting an integrated policy towardsproduct development based on life cycle thinking and eco-design to stimulate improvement of the environmental performance of each part ofproduct life cycle phases and achieve sustainable patterns of production and consumption are emphasized. The challenges in implementingsustainable manufacturing and the circular economy approaches are listed. A number of solutions are suggested to face up these challenges,for instance, increased awareness of enterprises particularly SME's of product life cycle issues and the opportunities that are available for costsavings and profit making from eco-innovation in product development for both the domestic and export markets and providing practical helpand advice directly to enterprises on integrated product development to promote enterprise led Eco-innovation. Aiming at contributing to sus-tainable manufacturing in China, Sino-UK Low Carbon Manufacturing Consortium, a multi-disciplinary research and educational partnershipbetween academia, industry and government agencies in the UK and China with interest in sustainable manufacturing issues, has been formedrecently.The vision, aims and benefits of membership of the consortium are also discussed.

Innovation of China's Circular Agricultural Development in the Perspective of Low Carbon Economy

On the basis of the concept and characteristics of circular economy, this paper analyzes the restraining factors of China's circular agricultural development as follows: issues concerning agriculture, countryside and farmers are outstanding; the problems of agricultural resources and agricultural ecological environment are serious; the quality of agricultural products cannot meet the demand of domestic and international market for food. Based on the internal requirements of low carbon economic development, this paper advances four innovative models concerning China's circular agricultural development as follows: the model of combining planting and breeding of agriculture, the developmental model of leisure and sightseeing, ecological integration model, and the developmental model of reusing agricultural byproducts. Every region should choose or create different circular agricultural model in different domains, in order to better use agricultural resources, reduce the consumption of agricultural energy inputs, reduce the emission of agricultural greenhouse gas, develop low carbon agriculture, and make great contribution for meeting the international challenges and promoting China's agricultural development.

Urban Agricultural Development from the Perspective of Circular Economy——An Analysis of Sino-Singapore Eco-city Model in Tianjin

The connotation and development of circular economy and circular agriculture are illustrated from the perspective of circular economy.Take the duplicable Sino-Singapore Eco-City in Tianjin as a case to analyze the background,significance and features of building Sino-Singapore Tianjin Eco-City and point out the sustainable developmental orientation of the "three harmony and three capabilities" as well as its inspiration on the development of Tianjin urban agriculture from the aspects of water-saving,land-saving and energy-saving.Under the direction of circular economy theory,the enhancement of economical utilization of agricultural resources and resource utilization of agricultural wastes has positive effects on improving urban environment:decentralize organic solid wastes from sewage cycle system;further study the physiological and biochemical mechanism of increasing yield and income of ecological agriculture;bring urban agriculture into city land utilization planning and city development planning.

Relationship between ecological economics and circular economy,eco-industry,cleaner production,and other relevant categories

Eco-industry, circular economy, cleaner production, industrial ecology or industrial ecosystem and other subjects are all categories related to sustainable developinent. This paper studies the relations and differences between the four categories and sustainable development as well as ecological economics. Circular economy, eco-industry, industrial ecosystem and cleaner production were put forward during the revolution in “end treatment pattern” of traditional industrial society. Industrial ecology, eco-industry and circular economy theory are three content expansions of cleaner production. Ecological economics is of instructive function theoretically and methodologically for circular economy, eco-industrial, cleaner production and industrial ecology. Circular economy theory is easier to be accepted, compared with ecological economics theory. And circular economy in nature is the complete application of ecological economics theory.

Evaluation on the Development of Agricultural Circular Economy in Hunan Province

By using conceptual model of BPEIR(Behavior-Pressure-Effect-Impact-Response) and Delphi method,we establish the evaluation index system of agricultural circular economy including four indices,namely index of socio-economic development,index of reducing input of resources,index of recycling of resources and index of safety of environment and resources.We conduct comprehensive evaluation on developmental level of agricultural circular economy from 1998 to 2007 in Hunan Province.The analysis results show that the agricultural circular economy of Hunan Province from 1998 to 2007,on the whole,has the tendency of development with annual growth rate of 1.89%.The annual decrease rate of recycling of resources and reducing input of resources from 1999 to 2003 is 25% and 11% respectively,which has become the main factor impeding development of agricultural circular economy.After the year 2003,it is mainly reducing input of resources.

Strategy and Mechanism Study for Promotion of Circular Economy in China

1 BACKGROUND OF THE TASK FORCE OF CIRCULAR ECONOMYIn responding to the call from the Chinese government to take the circular economy approach for new industrialization and sustainable development, the Task Force on Circular Economy & Cleaner Production (CETF) of the 3rd

Circular Economy in New Village Construction——A Case of Qinhuangdao City, China

On the strength of the theory of agricultural circular economy, the mutual relation between the development of agricultural circular economy and new village construction is analyzed. The results show that developing agricultural circular economy and constructing new village is the mutual promotion; realizing agricultural circular economy is the main target of new agricultural construction and developing agricultural circular economy is the way of realizing new village construction. The major problems in the development of agricultural circular economy in Qinhuangdao City are pointed out, covering weak ideological foundation of developing agricultural circular economy; inadequate directions from the government and insufficient technical and financial support. The countermeasures on developing agricultural circular economy in new village construction are put forward, including cultivating people's awareness on circular economy; establishing the law and regulation system of agricultural circular economy; intensifying the technical and model innovation of agricultural circular economy and accelerating the maketization pace of agro-products.

Strategic Green Supply Chain Based on Circular Economy——A New View for Sustainable Manufacturing in China

Due to recent changing environmental requirements affecting manufacturing operations,increasing attention is given to developing environmental management strategies for the supply chain. This paper discusses the strategies of green supply chain based on the concept of circular economy which was promoted in China as a new development strategy to alleviate the shortage of resource supply by improving the resource productivity and eco-efficiency of production and consumption,which will accelerate the economic transformation from the traditional supply chain to the green supply chain.

Development Model of Ecotourism Circular Economy in Lakefront Scenic Areas——A Case Study of Luchong Scenic Area by Fuxian Lake,Yunnan Province

Strategies of "guidance to different types of areas,promotion step by step" were given to study the development model of ecotourism circular economy in different types of tourist sites.By taking Luchong Scenic Area by the Fuxian Lake,Yunnan Province for an example,the general model of ecotourism circular economy in lakefront scenic areas was summarized,it was stressed that ecological principles and "5R"(rethinking,reducing,reusing,recycling,repairing)should be followed in its construction.Characteristics of a lakefront scenic area and actual conditions of its location region should be taken into consideration,with sewage treatment and lakefront environment protection as the focus,green scenic area and green tourism community as the carrier,a development model of ecotourism circular economy was established by considering relevant elements such as clean production,green consumption,waste processing,ecological compensation and industrial coupling,effective measures were given to introduce theories into practices,which would be the only chance for the lakefront scenic area realizing its sustainable development.

Approaches to Sustainable Consumption for Circular Economy

Consumer type and consumption need are analyzed in this paper. It is recognized that sustainable consumption accords with human＇s pursuing of well-being. Further, we analyze three types of realization models of sustainable consumption and focus onthe feasibility, realization process and policy measures of product service system.

Evaluation on the Developmental Level of Circular Economy in Jiangsu Province

Based on the brief description of the developmental status of social economy in Jiangsu Province,the index system including 16 indexes contained in 5 subsystems is established according to the statistics from Jiangsu Statistical Yearbook-2009,the practical situation of Jiangsu Province and the connotation of circular economy.The developmental trends of circular economy of 13 prefecture-level cities in Jiangsu Province are comprehensively evaluated by using the improved extreme value treatment,analytic hierarchy process(AHP),comprehensive evaluation of herdsman and comprehensive evaluation model of grey multi-level.The results show that the developmental level of circular economy in Jiangsu Province varies hugely in different areas,the difference of the comprehensive score between the crest value and minimum value is 0.29.In the end,in view of the problems in the development of circular economy,the countermeasures and suggestions on establishing and improving the management of circular economy,the operation and supervision mechanism;accelerating the industrial transformation and intensifying resource saving and comprehensive use of resource.

Study on the circular economy of dairy industry in Hohhot, China

On August 8, 2005. Hohhot was awarded the title of ＂Chinese Dairy Capital＂. Now dairy industry is one of the pillar industries in Hohhot, with strong driving effect to the development of social economy. However; the sustainable development of dairy industry in Hohhot is threatened by rapid scale expansion and restriction of environmental supporting capacity, In accord with the ideas and requirements of the circular economy theory, this paper analyzes dairy industry pattern from two aspects and establishes the industry system. The dairy industry mainly consists of cow breeding and dairy process. The circular economy mnst set about from the two aspects. For the most part, dairy processing should start from the two most key links, namely packing and water using.