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Circular Economy (CE) is an economic approach which aims to save the environment by eliminating waste and efficiently using resources by applying recycle, reuse, repair, remanufacturing and recycling strategies. The purpose of the article is to propose a concept of measurement the development of Environmental pillar in the context of Circular Economy, apply and provide empirical evidence based on the data of Baltic Sea Region countries. The research augmented for the analysis of Circular Economy which includes assessment model creation. The multi-criteria decision methods MULTIMOORA and TOPSIS were used to assess the development of Environmental pillar of Circular Economy in Baltic Sea Region. Results are useful to add to theoretical building and evaluate the Environmental aspect in the concept of Circular Economy.

The transition to a circular economy requires actions and policies. In the praxis of governance, a common way to steer the transition to a different state proceeds through the setting of targets. Thus far, no study has investigated circular economy targets in a systematic way. To bridge this gap, this study examines which targets can facilitate the transition towards a circular economy. The analysis focuses both on existing and new targets; the latter complement existing targets which are limited to a few discrete cases addressing only partially the goal of a more circular economy. A framework based on 10 common circular economy strategies (i.e. recover, recycling, repurpose, remanufacture, refurbish, repair, re-use, reduce, rethink, refuse) is applied to scrutinise the selected targets. The study clarifies that existing targets for recovery and recycling do not necessarily promote a circular economy, though they are the most commonly applied targets so far. Because of lack of efficacy of recovery and recycling, targets should instead favour other more powerful circular economy strategies. In relation to these, the study looks into new and existing targets showing how they can reduce waste, increase efficiency, close production loops, and maximise retention of the economic value of materials and products. In particular, the study proposes an expanded set of brand new targets for the transition to a circular economy together with a fresh view on targets aimed at scholars and decision-makers alike.

Circular economy (CE) and sustainability are interrelated, without being exchangeable. While sustainability tries to reconcile the management of productive resources with their increasing consumption, CE aims to make the productive process more efficient, reducing, reusing and recycling the results of the productive process as much as possible. The aim of this paper is to ascertain the systemic structure of interactions between sustainability and CE through the analysis of the existing literature from 2004 to 2021. For this purpose, a computational literature review and a content analysis of the main contributions of CE and sustainability, within the framework of the Sustainable Development Goals (SDGs), were conducted. The results show that there is a positive impact of the synergy between CE strategies and certain SDGs. Specifically, the circular strategies that generate the greatest synergies have to do with preserving materials through recycling, downcycling, and the measurement of indicators or reference scenarios. This is what has led to the inclusion of these concepts in the formulation of policies and strategies, as their multidisciplinary nature allows them to have an impact on areas such as agriculture or innovation, which currently lack specific measures. Therefore, the knowledge derived from this study will contribute favorably to future decisions and actions to be considered, as there is still the potential to legislate in favor of an even more sustainable framework.

Electricity from the combination of photovoltaic panels and wind turbines exhibits potential benefits towards the sustainable cities transition. Nevertheless, the highly fluctuating and intermittent character limits an extended applicability in the energy market. Particularly, batteries represent a challenging approach to overcome the existing constraints and to achieve sustainable urban energy development. On the basis of the market roll-out and level of technological maturity, five commercially available battery technologies are assessed in this work, namely, lead&ndash, acid, lithium manganese oxide, nickel&ndash, cadmium, nickel&ndash, metal hydride, and vanadium redox flow. When considering sustainable development, environmental assessments provide valuable information. In this vein, an environmental analysis of the technologies is conducted using a life cycle assessment methodology from a cradle-to-gate perspective. A comparison of the environmental burden of battery components identified vanadium redox flow battery as the lowest environmental damage battery. In terms of components, electrodes, the electrolyte, and the set of pumps, motors, racks, and bolts exhibited the greatest environmental impact related to manufacturing. In terms of materials, copper, steel, sulphuric acid, and vanadium were identified as the main contributors to the midpoint impact categories. The results have highlighted that challenging materials 4.0 are still needed in battery manufacturing to provide sustainable technology designs required to the future urban planning based on circular economy demands.

The transition towards a sustainable circular economy (CE) model is seen as a solution to keep the consumption of the earth’s resources within planetary boundaries. In the regional context, the CE is promoted through various policy actions, one being the smart specialisation concept. This paper provides a novel approach to examining the spatial adaption of a CE through a conceptual framework of research and innovation strategies for smart specialisation (S3) in Europe. This interdisciplinary research presents a multi-country comparison of S3 implementation in Europe in 12 regions that have defined the CE as a priority area. The data consist of interviews with representatives of organisations responsible for the regional S3 process. The findings indicate that a political demand exists for proceeding further with the construction of transformative activities involving the CE, but the models and stages of implementation vary. In addition, most regions still struggle with building specific monitoring and evaluation measures and mechanisms for the CE. Despite these challenges, promoting the CE as a strategic priority through the S3 process has, at least in some regions, helped define the CE targets and actions by focusing on existing regional assets and future potential.