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Prospective LCA of brown seaweed-based bioplastic: Upscaling from pilot to industrial scale 基于褐海藻的生物塑料的前瞻性生命周期评估：从试验规模到工业规模的提升

IF 10.9 1区环境科学与生态学 Q1 ENVIRONMENTAL STUDIES

Sustainable Production and Consumption

Pub Date : 2024-11-17 DOI: 10.1016/j.spc.2024.11.020

Maddalen Ayala , Neill Goosen , Leszek Michalak , Marianne Thomsen , Massimo Pizzol

Seaweed-based bioplastics are considered a possible alternative to conventional fossil-based plastics due to their potential environmental advantages. The cultivation of seaweed is a fast-growing practice that requires no arable land, freshwater, or fertilizers, perceiving it as an advantageous option for bioresource production. However, research on the environmental impacts of seaweed-based bioplastics is still limited, highlighting the need for a life cycle assessment (LCA) to evaluate their potential. In this article, a prospective LCA is conducted to assess the environmental impacts of brown seaweed-based bioplastic production, from pilot to industrial scale. Upscaling techniques are combined for each life-cycle stage, using interviews to upscale seaweed production and process simulation for the biorefinery and film fabrication steps, and the end-of-life scenario is modelled as composting. All the processes were upscaled to 4000 tonnes (t) per year in 2030 and 2 million tonnes (Mt) per year in 2035, including marginal suppliers of brown seaweed. The results show that the production of 1 kg of brown seaweed-based bioplastic resulted in approximately 1.37 kg CO₂-eq. in the best-performing scenario, producing 2 Mt per year in 2035 accounting for the carbon uptake, which is lower than low-density polyethylene (LDPE) with an impact of 3.6 kg CO₂-eq. The impact in marine eutrophication in the 2 Mt scenario is −0.009 kg N-eq., and −0.002 kg P-eq. in freshwater eutrophication. This study provides for the first time estimates of prospective industrial-scale impacts of the emerging seaweed-based bioplastic and shows how different upscaling techniques can be successfully combined, i.e., interviews and process simulation, to conduct a prospective LCA of seaweed-based bioplastics. The results demonstrate the potential of seaweed-based bioplastics as a sustainable alternative to conventional plastics.

海藻基生物塑料因其潜在的环境优势，被认为是传统化石基塑料的可能替代品。海藻种植生长迅速，不需要耕地、淡水或肥料，因此被视为生物资源生产的有利选择。然而，有关海藻类生物塑料对环境影响的研究仍然有限，这突出表明有必要进行生命周期评估（LCA），以评估其潜力。本文进行了前瞻性生命周期评估，以评估棕色海藻基生物塑料生产从中试到工业化生产的环境影响。在每个生命周期阶段都采用了扩大规模技术，利用访谈来扩大海藻生产规模，并对生物炼制和薄膜制造步骤进行过程模拟，同时将生命末期情景模拟为堆肥。所有工艺的规模在 2030 年达到每年 4000 吨，在 2035 年达到每年 200 万吨，其中包括棕色海藻的边际供应商。结果表明，在表现最佳的情况下，生产 1 千克褐藻基生物塑料产生的二氧化碳当量约为 1.37 千克，考虑到碳吸收，2035 年的年产量为 200 万吨，低于低密度聚乙烯（LDPE）产生的 3.6 千克二氧化碳当量。在 200 万吨情景下，对海洋富营养化的影响为-0.009 千克氮当量，对淡水富营养化的影响为-0.002 千克磷当量。本研究首次对新兴的海藻类生物塑料的预期工业规模影响进行了估算，并展示了如何将不同的升级技术（即访谈和过程模拟）成功结合起来，对海藻类生物塑料进行预期生命周期评估。研究结果证明了海藻基生物塑料作为传统塑料的可持续替代品的潜力。

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引用次数: 0

Re-evaluating beauty: Attitudes and perceptions of eco-friendly packaging in beauty care products - A systematic review 重新评价美丽：对美容护理产品环保包装的态度和看法--系统综述

IF 10.9 1区环境科学与生态学 Q1 ENVIRONMENTAL STUDIES

Sustainable Production and Consumption

Pub Date : 2024-11-15 DOI: 10.1016/j.spc.2024.11.011

Alexia Del Greco , Marco Bani , Giulia Rampoldi , Stefano Ardenghi , Paolo Galli , Maria Grazia Strepparava , Selena Russo

Contemporary society places a high value on physical appearance, leading to significant demand in the global cosmetics market, which is projected to reach nearly $129 billion by 2028. There is a growing interest in sustainable materials in order to tackle the environmental impact of the cosmetic sector and in particular of packaging.

This review explores consumer perceptions, attitudes, and behaviours towards green packaging in the cosmetics industry.

A systematic literature review following the PRISMA checklist for systematic reviews has been conducted to explore the current state of the art of scientific research in the area of psycho-social variables such as perceptions, attitudes, intentions and behaviours towards eco-friendly packaging of skin-care and beauty-care products.

The lack of clear definitions for eco-friendly, green, or natural packaging complicates consumer relationships with sustainable beauty products, leading to confusion from various claims and certifications. This confusion, coupled with low awareness of health and environmental impacts, may hinder informed purchasing decisions. While health and environmental benefits influence buying intentions, the primary factor shaping attitudes remains unclear. Eco-friendly packaging is important in encouraging purchases, but further research is needed for instance on ethical considerations and social media's role in sustainability. Additionally, socio-demographic factors affecting preferences are complex, and while younger consumers are more willing to invest in natural products, financial constraints often limit their choices.

The review highlights a gap in the literature concerning industry challenges and underscores the necessity for comprehensive models to better understand consumer motivations and preferences for green cosmetics. Limitations, such as sample representativeness and the diverse scales used in various studies, further restrict the generalizability of the findings, suggesting that ongoing research in this rapidly evolving field is essential. Some possible practical implications are also presented.

当代社会高度重视外貌，这导致全球化妆品市场需求巨大，预计到 2028 年将达到近 1,290 亿美元。本综述探讨了消费者对化妆品行业绿色包装的看法、态度和行为。我们按照 PRISMA 系统性综述清单进行了系统性文献综述，以探索社会心理变量领域的科学研究现状，如消费者对护肤和美容产品环保包装的认知、态度、意向和行为。这种混淆，加上对健康和环境影响的认识不足，可能会阻碍消费者做出明智的购买决策。虽然健康和环境效益会影响购买意向，但影响购买态度的主要因素仍不明确。生态友好型包装对鼓励购买很重要，但还需要进一步研究道德因素和社交媒体在可持续发展中的作用。此外，影响偏好的社会人口因素也很复杂，虽然年轻消费者更愿意投资天然产品，但经济上的限制往往会限制他们的选择。该综述强调了有关行业挑战的文献空白，并强调有必要建立综合模型，以更好地了解消费者对绿色化妆品的动机和偏好。研究的局限性，如样本的代表性和不同研究中使用的不同量表，进一步限制了研究结果的普遍性，这表明在这一快速发展的领域进行持续研究至关重要。本文还介绍了一些可能的实际意义。

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引用次数: 0

Comparative life cycle assessment of integrated and organic viticulture based on a long-term field trial in Germany 基于德国长期田间试验的综合和有机葡萄栽培生命周期比较评估

IF 10.9 1区环境科学与生态学 Q1 ENVIRONMENTAL STUDIES

Sustainable Production and Consumption

Pub Date : 2024-11-15 DOI: 10.1016/j.spc.2024.11.012

Franca Carlotta Foerster , Johanna Döring , Mirjam Koch , Randolf Kauer , Manfred Stoll , Yvette Wohlfahrt , Moritz Wagner

Organic farming practices are considered a promising solution for reducing environmental burdens related to intensive agricultural management practices. However, organic viticulture often results in lower yields. This study seeks to conduct a comparative life cycle assessment (LCA) of integrated and organic viticulture practices using data from a long-term experiment in Germany. By directly comparing management systems within the same vineyard, environmental variations attributed to geographic disparities are excluded from the analysis making this study unique in its use of consistent, long-term data. The LCA is conducted in alignment with the ISO standards 14040 and 14044 and applying the indicators and methods defined in the Product Environmental Footprint standard of the European Union using the software openLCA. To assess the environmental impacts relative to yield variations two functional units were chosen - “area” and “mass”. The results reveal that organic viticulture generally performs better on an area basis across most environmental categories, except for freshwater ecotoxicity, eutrophication, and mineral and metal resource use. However, lower yields in organic farming result in higher impacts per kilogram of grapes produced. The use of copper fungicides merges as a significant drawback due to its ecotoxicity, highlighting the need for strategies to reduce copper inputs and increase yields to improve the sustainability of organic viticulture. Additionally, the environmental impact of trellis production is identified as a critical hotspot for both production systems, suggesting that prolonging the lifespan of trellis materials or using less impactful alternatives could significantly reduce the overall environmental footprint. In conclusion, while organic viticulture offers certain environmental benefits, challenges related to yield and copper use must be addressed to enhance its sustainability. Future research should also consider integrating biodiversity and ecosystem services into LCA methodologies, as these factors could alter the comparative outcomes of organic and integrated management systems.

有机耕作法被认为是减少集约型农业管理方法所带来的环境负担的一种有前途的解决方案。然而，有机葡萄栽培往往导致产量降低。本研究试图利用德国一项长期实验的数据，对综合和有机葡萄栽培实践进行生命周期比较评估（LCA）。通过直接比较同一葡萄园内的管理系统，在分析中排除了因地理差异造成的环境变化，使本研究在使用一致的长期数据方面独树一帜。生命周期评估符合 ISO 14040 和 14044 标准，并采用了欧盟产品环境足迹标准中规定的指标和方法，使用的软件是 openLCA。为了评估产量变化对环境的影响，选择了两个功能单位--"面积 "和 "质量"。结果表明，除了淡水生态毒性、富营养化以及矿物质和金属资源利用外，有机葡萄栽培在大多数环境类别中的面积表现通常更好。然而，有机栽培的产量较低，导致每公斤葡萄产生的影响较高。铜杀菌剂的使用因其生态毒性而成为一个重大缺陷，这突出表明有必要采取减少铜投入和提高产量的策略，以改善有机葡萄栽培的可持续性。此外，大棚生产对环境的影响被认为是这两种生产系统的一个关键热点，这表明延长大棚材料的使用寿命或使用影响较小的替代品可以显著减少对环境的总体影响。总之，虽然有机葡萄栽培具有一定的环境效益，但必须解决与产量和铜的使用有关的挑战，以提高其可持续性。未来的研究还应考虑将生物多样性和生态系统服务纳入生命周期评估方法，因为这些因素可能会改变有机管理系统和综合管理系统的比较结果。

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引用次数: 0

A value-sensitive approach for integrated seawater desalination and brine treatment 综合海水淡化和盐水处理的价值敏感方法

IF 10.9 1区环境科学与生态学 Q1 ENVIRONMENTAL STUDIES

Sustainable Production and Consumption

Pub Date : 2024-11-14 DOI: 10.1016/j.spc.2024.11.006

Rodoula Ktori, Mar Palmeros Parada , Marcos Rodriguez-Pascual, Mark C.M. van Loosdrecht, Dimitrios Xevgenos

The transition to seawater desalination integrated with resource recovery, particularly in water- and energy-scarce regions, requires innovative approaches that consider societal benefits and costs. This study goes beyond traditional techno-economic evaluations by employing a Value-Sensitive Design (VSD) approach, which guides the selection of performance indicators and informs the design of technical scenarios for integrated seawater desalination and brine treatment systems. VSD ensures that the scenarios are socially relevant by directly incorporating stakeholder values into the design and assessment process. Four technical scenarios (Sc) were used to evaluate the VSD approach: Sc1) maximum water recovery, Sc2) and Sc3) integrated desalination with brine treatment for maximum resource recovery (using different configurations) and Sc4) electricity-based desalination for chemical recovery. Techno-economic models are implemented using Python to analyse the feasibility and performance of these scenarios. The modelling results indicate that all scenarios achieve zero brine production. However, the trade-offs between resource recovery and greenhouse gas emissions are evident. Increased salt recovery leads to higher CO₂ emissions (locally) due to electricity consumption. Scenario 1 minimized electrical energy consumption and emissions while maximizing water production. Scenarios 2 and 3 performed best in water and high-quality salt production. Despite its higher CO₂ emissions, Scenario 4 proved most profitable due to the production of chemicals. These findings highlight the importance of tailoring plant designs to regional needs. By providing a comprehensive understanding of trade-offs, the VSD approach fosters stakeholder dialogue and serves as a valuable decision-making tool for designing sustainable desalination systems.

向海水淡化与资源回收一体化过渡，尤其是在缺水和缺能地区，需要考虑社会效益和成本的创新方法。这项研究超越了传统的技术经济评估，采用了价值敏感设计（VSD）方法，指导性能指标的选择，并为海水淡化和盐水处理一体化系统的技术方案设计提供信息。VSD 通过将利益相关者的价值直接纳入设计和评估过程，确保方案具有社会相关性。VSD 方法采用了四种技术方案（Sc）进行评估：Sc1）最大限度地回收水；Sc2）和 Sc3）综合海水淡化与盐水处理，以实现最大限度的资源回收（使用不同的配置）；Sc4）基于电力的海水淡化，以实现化学回收。技术经济模型使用 Python 实现，以分析这些方案的可行性和性能。建模结果表明，所有方案都能实现零盐水生产。然而，资源回收与温室气体排放之间的权衡是显而易见的。由于电力消耗，盐回收量的增加导致二氧化碳排放量增加（本地）。方案 1 在最大限度提高产水量的同时，最大限度地减少了电能消耗和排放。方案 2 和 3 在水和优质盐生产方面表现最佳。尽管方案 4 的二氧化碳排放量较高，但由于生产化学品，其盈利能力最强。这些发现强调了根据地区需求定制工厂设计的重要性。通过提供对权衡的全面理解，可持续发展分区方法促进了利益相关者的对话，并成为设计可持续海水淡化系统的重要决策工具。

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引用次数: 0

A critical review on spatially explicit life cycle assessment methodologies and applications 关于空间明确生命周期评估方法和应用的重要评论

IF 10.9 1区环境科学与生态学 Q1 ENVIRONMENTAL STUDIES

Sustainable Production and Consumption

Pub Date : 2024-11-14 DOI: 10.1016/j.spc.2024.11.015

Shuning Shi, Xiaoyu Yan

Life cycle assessment (LCA) studies that have involved spatial information in the life cycle inventory (LCI) and/or life cycle impact assessment (LCIA) phases have steadily increased in recent years. A comprehensive and up-to-date critical review of recent spatially explicit LCA studies is urgently needed to facilitate wider and consistent employment of spatially explicit LCA. This study collated, classified and critically reviewed studies published over the past two decades on LCA methodologies and applications that integrate spatial information. Among 86 spatially explicit studies reviewed, 61 focus on LCIA method development, 4 on LCI or LCA methodology development, and 21 are applications of existing methodologies in different regions and sectors. Mathematical algorithms developed using Python or MATLAB and LCA software tools such as OpenLCA and Brightway 2 are the most commonly used methodologies to integrate spatial information. The adoption of spatially explicit LCAs remains limited in general mainly due to the lack of high-resolution inventory data and the technical expertise required for implementation. There are trade-offs between the expected benefits and increased complexity of spatially explicit LCA, and its actual net effect compared with aspatial LCA is not yet clear. Context-based recommendations for implementing the existing spatially explicit LCA methodologies are provided. Future research should focus on high-resolution inventory data generation and disclosure, accessible spatially explicit LCI/LCIA methodology improvements and developments, and the establishment of frameworks to systematically quantify the benefits of spatially explicit LCA.

近年来，在生命周期清单（LCI）和/或生命周期影响评估（LCIA）阶段涉及空间信息的生命周期评估（LCA）研究稳步增加。为了促进更广泛和一致地使用空间显式生命周期评估，迫切需要对近期的空间显式生命周期评估研究进行全面和最新的评论。本研究对过去二十年中发表的有关整合空间信息的生命周期评估方法和应用的研究进行了整理、分类和严格审查。在所审查的 86 项空间明确性研究中，61 项侧重于 LCIA 方法的开发，4 项侧重于 LCI 或 LCA 方法的开发，21 项是现有方法在不同地区和部门的应用。使用 Python 或 MATLAB 开发的数学算法以及 LCA 软件工具（如 OpenLCA 和 Brightway 2）是整合空间信息最常用的方法。空间显式生命周期评估的采用总体上仍然有限，主要原因是缺乏高分辨率清单数据和实施所需的专业技术知识。空间显式生命周期评估的预期效益与增加的复杂性之间存在权衡，其与空间生命周期评估相比的实际净效果尚不明确。本文就实施现有的空间明确性生命周期评估方法提出了基于背景的建议。未来的研究应侧重于高分辨率清单数据的生成和披露、可获取的空间明确性 LCI/LCIA 方法的改进和发展，以及系统量化空间明确性生命周期评估效益的框架的建立。

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引用次数: 0

Circular strategy assessment for digital services: The CADiS framework 数字服务的循环战略评估：CADiS 框架

IF 10.9 1区环境科学与生态学 Q1 ENVIRONMENTAL STUDIES

Sustainable Production and Consumption

Pub Date : 2024-11-13 DOI: 10.1016/j.spc.2024.11.007

Raphael Ricardo Zepon Tarpani , Joan Manuel F. Mendoza , Laura Piedra-Muñoz , Alejandro Gallego-Schmid

The incorporation of digital technologies (DTs) and digital services into our daily lives is expected to grow in the years ahead. Whereas these technologies and services are recognised as important enablers of sustainable development, their resource footprint and environmental impacts are often underestimated or overlooked. One of the key proposals expected to mitigate the negative consequences of DTs and digital services is the development circular economy (CE) strategies. In an attempt to synthesise these important concepts while contributing to environmental sustainability, this paper introduces the Circular strategy Assessment for Digital Services (CADiS) framework. Its main goal is to support a simultaneous holistic understanding of the environmental impacts of digital services and the role of CE strategies in ameliorating them. Its open structure and granularity in terms of system coverage (nano/micro, meso and macro levels) and flow analysis (materials, energy and the role of data management) allow pinpointing the most suited interventions for achieving greater circularity and environmental sustainability. For this, the CADiS framework considers circularity (C) indicators and life cycle impact assessment (LCIA), which could be considered independently or merged, to promptly evaluate many scenarios at once. To demonstrate its practical application, a case study of an eHealth service deployed in three distinct elderly living schemes is presented. The evaluated digital health and well-being service integrates six types of electronic devices for urgent notifications, audio, and video communication, and is interconnected using Power over Ethernet (PoE) infrastructure. The results identified the scenario that incorporates regenerative/cleaner energy sources and closing material loops as the best-performing one. Given the ever-expanding importance of digitalization in our society, the CADiS framework is timely to facilitate environmental assessment reporting and increase the circularity of digital services to achieve sustainable development.

预计未来几年，数字技术（DT）和数字服务将越来越多地融入我们的日常生活。虽然这些技术和服务被认为是可持续发展的重要推动因素，但其资源足迹和环境影响往往被低估或忽视。发展循环经济（CE）战略是减轻数字技术和数字服务负面影响的关键建议之一。为了在促进环境可持续性的同时综合这些重要概念，本文介绍了数字服务循环战略评估（CADiS）框架。其主要目标是支持同时全面了解数字服务对环境的影响以及 CE 战略在改善这些影响方面的作用。该框架在系统覆盖（纳米/微观、中观和宏观层面）和流程分析（材料、能源和数据管理的作用）方面的开放式结构和粒度，有助于确定最适合的干预措施，以实现更大的循环性和环境可持续性。为此，CADiS 框架考虑了循环性 (C) 指标和生命周期影响评估 (LCIA)，这两个指标可以单独考虑，也可以合并考虑，以便同时对多种方案进行及时评估。为了展示 CADiS 的实际应用，本报告介绍了在三个不同的老年人生活计划中部署电子健康服务的案例研究。所评估的数字健康和福祉服务集成了六种电子设备，用于紧急通知、音频和视频通信，并使用以太网供电（PoE）基础设施进行互联。结果表明，包含再生/清洁能源和闭合材料循环的方案表现最佳。鉴于数字化在我们社会中的重要性日益增加，CADiS 框架适时地促进了环境评估报告，并提高了数字服务的循环性，从而实现了可持续发展。

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引用次数: 0

Willingness to pay for carbon tax in Japan 日本的碳税支付意愿

IF 10.9 1区环境科学与生态学 Q1 ENVIRONMENTAL STUDIES

Sustainable Production and Consumption

Pub Date : 2024-11-13 DOI: 10.1016/j.spc.2024.11.004

Liu Cao , Akira Toyohara , You Li , Weisheng Zhou

Inspired by Scandinavia's carbon tax reforms, Japan's Ministry of the Environment first considered emissions trading systems (ETS) and carbon taxes in 1995. As a policy tool to address climate change, Japan is dedicated to the design and development of a carbon tax. Current plans include introducing a surcharge on fossil fuel supplies in 2028. This paper aims to investigate the policy's acceptability using the Contingent Valuation Method (CVM) to quantify data from 1627 respondents and estimate and compare the willingness to pay (WTP) for a carbon tax among the Japanese population and Tokyo residents. Additionally, this study includes a supplementary analysis of the WTP distribution between Japan and Tokyo and examines the key factors contributing to the increase in the proportion of respondents at the maximum truncation point of the WTP amount in the WTP graph for the Japanese sample compared to the preceding monetary threshold. The results indicate that the allocation of carbon tax revenues as subsidies for clean energy technologies led to the highest median WTP in the Japanese sample, which was 4008 JPY ($29, 1 USD = 140.53 JPY, average for 2023). A Tobit regression model was used to track the factors influencing willingness to pay, revealing that gender, education, household income, and understanding of the carbon tax were highly correlated with overall willingness to pay. Among them, the highly educated Japanese population expressed greater concern about the transparency of the carbon tax procedures. High-income groups and corporate executives demonstrated a relatively higher willingness to pay when using carbon tax revenues to subsidize clean energy technologies. Tokyo's sample reveals a degree of regional heterogeneity in willingness to pay, indicating that Tokyo's experience with the carbon tax faces challenges in its promotion across Japan. Japan's carbon tax policy strategies hold potential for promotion in surrounding regions and developing countries. Additionally, the study concludes with policy recommendations based on the analysis results.

受斯堪的纳维亚碳税改革的启发，日本环境省于 1995 年首次考虑了排放交易系统（ETS）和碳税。作为应对气候变化的政策工具，日本致力于碳税的设计和开发。目前的计划包括在 2028 年对化石燃料供应征收附加税。本文旨在利用权变估值法（CVM）对来自 1627 名受访者的数据进行量化，并估算和比较日本民众和东京居民的碳税支付意愿（WTP），从而调查该政策的可接受性。此外，本研究还对日本和东京的 WTP 分布进行了补充分析，并研究了导致日本样本的 WTP 图表中 WTP 金额最大截断点的受访者比例与前一货币阈值相比增加的关键因素。结果表明，碳税收入作为清洁能源技术补贴的分配导致日本样本中 WTP 中值最高，达到 4008 日元（29 美元，1 美元 = 140.53 日元，2023 年平均值）。采用托比特回归模型对支付意愿的影响因素进行了追踪，结果显示，性别、教育程度、家庭收入和对碳税的理解与总体支付意愿高度相关。其中，受过高等教育的日本人更关注碳税程序的透明度。高收入群体和企业高管在使用碳税收入补贴清洁能源技术时，表现出相对较高的支付意愿。东京的样本显示了一定程度的地区支付意愿异质性，这表明东京的碳税经验在日本全国的推广中面临挑战。日本的碳税政策战略具有在周边地区和发展中国家推广的潜力。此外，本研究还根据分析结果提出了政策建议。

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引用次数: 0

A review of life cycle impacts and costs of precision agriculture for cultivation of field crops 大田作物种植精准农业的生命周期影响和成本审查

IF 10.9 1区环境科学与生态学 Q1 ENVIRONMENTAL STUDIES

Sustainable Production and Consumption

Pub Date : 2024-11-12 DOI: 10.1016/j.spc.2024.11.010

Sofia Bahmutsky, Florian Grassauer, Vivek Arulnathan, Nathan Pelletier

Assessing precision agriculture in crop production based on life cycle thinking and assessments allows for the consideration of multiple environmental as well as economic aspects at a systems level. Research at this intersection is, however, notably lacking. This review paper seeks to understand the current state of both environmental and economics research with respect to different agricultural crop production methods (orchard, vegetable, open field crop, etc.), regions, and the types of precision agriculture technologies applied in each context. The Preferred Reporting Items for Systematic Reviews and Meta-Analysis method was used to answer three review questions to address a targeted subset of precision agriculture technologies relevant to field crop production, from both environmental and economic perspectives and at the global level. Fertilizer production/use and associated field-level emissions are the leading cause of environmental impacts in many life cycle impact categories, and energy and pesticide use also contribute significantly. For most environmental impact categories, the utilization of precision agriculture practices reduced these impacts as compared to conventional practices. Many precision agriculture technologies focus on nitrogen management, namely variable rate application of nutrients, but disproportionately in the context of high value crops. There is evidence that supports the notion that variable rate fertilization management leads to reduction in many but not necessarily all environmental impacts. Some studies reported no, or limited economic benefits associated with precision agriculture technologies, however overall results suggest that precision agriculture utilization delivers economic benefits either via cost savings, input savings, and/or increases to yield, margin, or profits. Variable rate technology is highlighted as a promising subset of precision agriculture technologies in terms of environmental impact reductions and economic benefits.

基于生命周期思维和评估对作物生产中的精准农业进行评估，可以在系统层面上考虑多个环境和经济方面。然而，这方面的研究明显不足。本综述论文旨在了解针对不同农作物生产方式（果园、蔬菜、露地作物等）、地区以及在各种情况下应用的精准农业技术类型的环境和经济学研究现状。我们采用系统综述和元分析首选报告项目的方法来回答三个综述问题，从环境和经济角度以及全球层面来探讨与大田作物生产相关的精准农业技术的目标子集。在许多生命周期影响类别中，化肥生产/使用和相关的田间排放是造成环境影响的主要原因，能源和农药的使用也有很大影响。在大多数环境影响类别中，与传统做法相比，精准农业做法的使用减少了这些影响。许多精准农业技术侧重于氮肥管理，即养分的可变施用率，但在高价值作物方面却不成比例。有证据表明，可变施肥量管理可减少许多环境影响，但不一定是所有环境影响。一些研究报告称，精准农业技术没有带来经济效益，或经济效益有限，但总体结果表明，精准农业的利用通过节约成本、节省投入和/或提高产量、利润率或利润带来了经济效益。就减少环境影响和经济效益而言，变速技术是精准农业技术中很有前景的一个子集。

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引用次数: 0

The impact of influencers on sustainable consumption: A systematic literature review 影响者对可持续消费的影响：系统文献综述

IF 10.9 1区环境科学与生态学 Q1 ENVIRONMENTAL STUDIES

Sustainable Production and Consumption

Pub Date : 2024-11-12 DOI: 10.1016/j.spc.2024.10.024

Ana Cristina Munaro , Renato Hübner Barcelos , Eliane Cristine Francisco Maffezzolli

The pressing need for environmentally friendly behaviors and sustainable consumption practices has become paramount in light of climate challenges and evolving societal mindsets, particularly among younger generations. Recognizing the influential role of social media influencers in shaping attitudes and behaviors, this study conducts a systematic literature review to assess the impact of influencers on promoting sustainable consumption, leveraging the Theory-Context-Characteristics-Methods (TCCM) and Antecedents-Decisions-Outcomes (ADO) frameworks. By analyzing 52 Web of Science and Scopus articles, the study identifies critical theories, methods, and contexts related to influencers' roles in shaping sustainable consumer behavior. Furthermore, it proposes an integrative conceptual framework that links influencers with sustainable consumption outcomes, highlighting key antecedents, decisions, and results. The findings underscore the effectiveness of influencers in shaping followers' purchase intentions, attitudes, and sustainable behaviors through various personal attributes and content characteristics, such as credibility, perceived expertise, green orientation, and message appeal type. The study concludes with recommendations for researchers on how to address current knowledge gaps in the field and provides insights for organizations on leveraging influencer campaigns to advance sustainability goals.

鉴于气候挑战和不断变化的社会心态，尤其是年轻一代对环保行为和可持续消费实践的迫切需求已变得极为重要。认识到社交媒体影响者在塑造态度和行为方面的影响力，本研究利用 "理论-背景-特征-方法"（TCCM）和 "前因-决定-结果"（ADO）框架进行了系统的文献综述，以评估影响者对促进可持续消费的影响。通过分析 52 篇 Web of Science 和 Scopus 文章，本研究确定了与影响者在塑造可持续消费行为中的作用相关的关键理论、方法和背景。此外，研究还提出了一个综合概念框架，将影响者与可持续消费结果联系起来，强调了关键的前因、决定和结果。研究结果强调了影响者通过各种个人属性和内容特征（如可信度、感知到的专业知识、绿色导向和信息诉求类型）影响追随者的购买意向、态度和可持续行为的有效性。研究最后向研究人员提出了如何解决目前该领域知识空白的建议，并为企业利用影响者活动推进可持续发展目标提供了见解。

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引用次数: 0

Conceptualizing circular economy policy instruments: The case of recycled content standards 循环经济政策工具的概念化：再生成分标准案例

IF 10.9 1区环境科学与生态学 Q1 ENVIRONMENTAL STUDIES

Sustainable Production and Consumption

Pub Date : 2024-11-12 DOI: 10.1016/j.spc.2024.11.009

Mattia Maeder, Magnus Fröhling

Recycled content standards (RCSs) are an increasingly popular regulatory policy instrument requiring recycled materials in new products, thus aiming to close material loops. Public policy can boost the implementation of a circular economy (CE), but the relationship between individual policy instruments such as RCSs and CE needs more research. In this study, we reviewed 62 RCS policies in 30 jurisdictions and 19 scientific articles on RCSs. Our analysis has shown a new wave of increasingly stringent RCSs in multiple jurisdictions worldwide since 2018, primarily for packaging plastics and targeting CE goals. Based on our RCS study, we developed a conceptual framework for CE policy instruments with three main results. First, CE policy instruments have crucial characteristics, including feasibility, design, and administration. Second, they target the economic, environmental, and social pillars of sustainable development. Third, they have potential systemic effects at multiple abstraction levels. Our framework can be used by researchers, policymakers, and industry practitioners to understand how policy instruments contribute to CE but may have unforeseen consequences. Thus, our study guides effective CE policymaking and recommends investigating comprehensive CE policy mixes.

回收成分标准（RCSs）是一种日益流行的监管政策工具，要求在新产品中使用回收材料，从而实现材料闭环。公共政策可以促进循环经济（CE）的实施，但诸如回收成分标准等单个政策工具与循环经济之间的关系还需要更多的研究。在这项研究中，我们回顾了 30 个司法管辖区的 62 项循环经济政策和 19 篇有关循环经济的科学文章。我们的分析表明，自 2018 年以来，全球多个司法管辖区掀起了新一轮日益严格的 RCS 浪潮，主要针对包装塑料并瞄准 CE 目标。基于我们的 RCS 研究，我们为 CE 政策工具制定了一个概念框架，并得出了三个主要结果。首先，CE 政策工具具有关键特征，包括可行性、设计和管理。第二，它们针对可持续发展的经济、环境和社会支柱。第三，它们在多个抽象层面具有潜在的系统效应。我们的框架可供研究人员、政策制定者和行业从业者使用，以了解政策工具如何有助于促进可持续消费，但又可能产生不可预见的后果。因此，我们的研究可以指导有效的行政首长协调会决策，并建议调查全面的行政首长协调会政策组合。

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引用次数: 0