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Aquaculture and waste valorization have the potential to show solid achievements toward food security and improvements in the circularity of resources, which are crucial aspects of achieving a sustainable lifestyle in agreeance with Agenda 2030 goals. This study aims to optimize and simplify the decision-making processes for the valorization of marine wastes (natural and from aquaculture) as secondary raw materials to produce high-value-added market goods. However, significant concentrations of pollutants may be present within wastes, compromising overall quality, and social dynamics can hinder their usage further. Goro's lagoon was chosen as a case study, where the relations between the ecosystem services, a thriving bivalve economy, and social dynamics are deeply rooted and intertwined. Therefore, in the manuscript cost–benefit and foresight analyses are conducted to determine the best usage for algal biomass considering pollution, social acceptance, and profitability. These analyses are virtually conducted on bio-refineries that could be operating in the case study's area: briefly, for a thirty-year running bio-plant, the CBA indicates the two best alternatives with an income of 5 billion euros (NPV, with a 5% discount rate) for a biofuel-only production facility, and a half for a multiproduct one, leading to the conclusion that the first is the best alternative. The foresight, instead, suggests a more cautious approach by considering external factors such as the environment and local inhabitants. Hence, the main innovation of this work consists of the decision-maker's holistic enlightenment toward the complexities and the hidden threats bound to this kind of closed-loop efficiency-boosting process, which eventually leads to optimized decision-making processes. [ABSTRACT FROM AUTHOR]

In Europe, micro‐firms contribute significantly to both the economy and the environmental impact on ecosystems. Helping them become greener and stimulating innovation toward new sustainable and circular solutions could substantially contribute to the European goal of achieving carbon neutrality and environmental sustainability, as promoted by the European Green Deal and Next Generation EU programs. Nevertheless, eco‐innovation (EI) by micro‐firms is studied little in the literature. In this paper, we analyze the main determinants of conventional and EI adoption by micro‐firms. We used an ad‐hoc survey developed for enterprises in Emilia‐Romagna (Italy), an important region in terms of innovation where micro‐firms play a significant role in the economy. The paper analyzes whether human capital, training, R&D activities, collaboration activities to improve learning, and the environmental culture within the firm act as main determinants of innovation adoption, in addition to other standard drivers and barriers to innovation adoption studied in the extant literature. Moreover, we compare innovation adoption strategies between micro‐firms and SMEs. While our results highlight differences in the determinants of EI and conventional innovation adoption, there are important heterogeneities when it comes to innovation adoption strategies. [ABSTRACT FROM AUTHOR]

This work explores the transition process towards a circular economic model in the European context. By placing the role of policies and waste as a focus of the debate, it first examines the possible effects that a stringent policy can generate and, secondly, how much waste and its management can influence the goodness of the transition process. By analyzing European data on major indicators of circularity, waste generation, and management, this paper attempts to provide a snapshot of the European situation and its different speeds along the transition path. In light of the recent development programs established by European institutions in the aftermath of the Covid-19 pandemic that strained the world economy, the trends show how program resources should be directed towards key sustainability sectors that can stimulate European countries towards a common circular pathway. [ABSTRACT FROM AUTHOR]