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Sewage sludge management is crucial for water utilities to move towards a circular valorisation of resources. The current literature focuses mainly on the technological aspects of sludge management strategies. However, the current discussion of these strategies does not consider possible pressures arising from the utilities' civil society stakeholders and from policymakers. To fill this gap, this paper develops a conceptual framework, based on the current literature, that identifies the utility's key decisions on sludge management strategies (valorisation route, overperformance and vertical integration), and links them to possible pressures arising from civil society and existing regulations. Subsequently, the study validates the framework through a multiple explanatory case study, investigating the empirical relevance of such pressures in six water utilities across Europe. The influence of citizens and municipalities is found to be crucial in the choice of sludge valorisation routes. Economic instruments, command and control instruments and, new to the literature, regulatory uncertainty are found to be key policy features influencing utilities' decisions on sludge management. The paper provides a first-of-its-kind investigation that highlights the mechanisms through which policymakers and civil society stakeholders shape utilities' sewage sludge management strategies. The results complement and extend existing theoretical knowledge on the role of institutional pressures in the implementation of sustainable environmental systems. • Stakeholders' influences on utilities' sludge management choices are conceptualised. • Policymakers and civil society influence utilities' sludge management choices. • Incentives, obligations, regulatory uncertainty shape sludge management choices. • Citizens and municipalities drive utilities' sludge management choices. • Utilities' characteristics moderate the impact of institutional influences on their choices. [ABSTRACT FROM AUTHOR]

The Mediterranean basin is one of the most vulnerable regions worldwide due to its population density, the concentration of economic activities along the coasts and borderline climatic balance. It is identified as one of the most critical erosion hotspots in Europe, mainly due to the degradation of coastal areas, overexploitation and unsustainable practices affecting beach tourism, agriculture and fishing. The region is also affected by other phenomena such as storms and floods, which are exacerbated by climate change. To mitigate and adapt to these environmental and climatic changes, Nature based Solutions (NbSs) are considered a promising step-forward. However, despite their global recognition in both research and policy, few scientific papers and documents on the state of NbSs implementation for coastal risk management in the Mediterranean exist. This paper aims to provide an understanding of the status of NbS adoption for coastal risk management in the Mediterranean through a literature review. Out of 162 scientific papers and documents, only 23 were found to be relevant to the study. Through the definition and support of an innovative matrix-based approach, the analysis of the state of adoption of NbSs have been performed. Despite the limited information on the state of the adoption of NbSs for coastal risk management in the Mediterranean due to the low numbers of scientific research and documents available, some key considerations have been revealed. • The Mediterranean basin is the most critical erosion hotspots in Europe. • NbSs are recognized a promising step-forward in coastal risk management. • Novel framework for the analysis of past and present NbS implementation. • Few studies report the adoption of NbSs for Mediterranean coastal risk management. • NbS for coastal risk management in the Mediterranean is still in an experimental phase. [ABSTRACT FROM AUTHOR]

This paper reviews the current problems and prospects to overcome circular water economy management challenges in European countries. The geopolitical paradigm of water, the water economy, water innovation, water management and regulation in Europe, environmental and safety concerns at water reuse, and technological solutions for water recovery are all covered in this review, which has been prepared in the frame of the COST ACTION (CA, 20133) FULLRECO4US, Working Group (WG) 4. With a Circular Economy approach to water recycling and recovery based on this COST Action, this review paper aims to develop novel, futuristic solutions to overcome the difficulties that the European Union (EU) is currently facing. The detailed review of the current environmental barriers and upcoming difficulties for water reuse in Europe with a Circular Economy vision is another distinctive aspect of this study. It is observed that the biggest challenge in using and recycling water from wastewater treatment plants is dealing with technical, social, political, and economic issues. For instance, geographical differences significantly affect technological problems, and it is effective in terms of social acceptance of the reuse of treated water. Local governmental organizations should support and encourage initiatives to expand water reuse, particularly for agricultural and industrial uses across all of Europe. It should not also be disregarded that the latest hydro politics approach to water management will actively contribute to addressing the issues associated with water scarcity. • We concentrated on new future perspectives for addressing current resource recovery strategy challenges. • We revealed a snapshot for future needs for a fully circular European economy. • We built a discussion platform in holistic water recovery by COST Action. [ABSTRACT FROM AUTHOR]

Current urban and transport planning practices have significant negative health, environmental, social and economic impacts in most cities. New urban development models and policies are needed to reduce these negative impacts. The Superblock model is one such innovative urban model that can significantly reduce these negative impacts through reshaping public spaces into more diverse uses such as increase in green space, infrastructure supporting social contacts and physical activity, and through prioritization of active mobility and public transport, thereby reducing air pollution, noise and urban heat island effects. This paper reviews key aspects of the Superblock model, its implementation and initial evaluations in Barcelona and the potential international uptake of the model in Europe and globally, focusing on environmental, climate, lifestyle, liveability and health aspects. We used a narrative meta-review approach and PubMed and Google scholar databases were searched using specific terms. The implementation of the Super block model in Barcelona is slow, but with initial improvement in, for example, environmental, lifestyle, liveability and health indicators, although not so consistently. When applied on a large scale, the implementation of the Superblock model is not only likely to result in better environmental conditions, health and wellbeing, but can also contribute to the fight against the climate crisis. There is a need for further expansion of the program and further evaluation of its impacts and answers to related concerns, such as environmental equity and gentrification, traffic and related environmental exposure displacement. The implementation of the Superblock model gained a growing international reputation and variations of it are being planned or implemented in cities worldwide. Initial modelling exercises showed that it could be implemented in large parts of many cities. The Superblock model is an innovative urban model that addresses environmental, climate, liveability and health concerns in cities. Adapted versions of the Barcelona Superblock model are being implemented in cities around Europe and further implementation, monitoring and evaluation are encouraged. The Superblock model can be considered an important public health intervention that will reduce mortality and morbidity and generate cost savings for health and other sectors. [ABSTRACT FROM AUTHOR]

Focusing on the European context, this paper re-examines the relationship between the ESG and financial performance and whether CSR attitude moderates this relationship. A panel data set with all the listed companies in STOXX Europe 600, covering the period 2012–2022 was built, with company data being sourced from the Refinitiv Eikon platform for a total of 6600 firm-year observations. Six measures of financial performance and three regression frameworks were considered for analysis. Overall, inconsistent patterns of effect are identified across ESG predictors and financial performance measures. The presence of a CSR committee was found to negatively moderate the effect of ESG score on ROA only, whereas an external auditor to the CSR report to negatively moderate it with share price. Future research should consider replicating the proposed re-examination framework in other data settings and legislative and accounting contexts to strengthen the current evidence base and therefore deepen our understanding of the mechanisms underlying the investigated relationships. • ESG scores affect financial performance measures inconsistently. • A CSR committee negatively moderates the effect of ESG score on ROA. • An external auditor negatively moderates the effect of ESG score on share price. [ABSTRACT FROM AUTHOR]

Urban forests as nature-based solutions (UF–NbS) play a crucial role for promoting the health and well-being of urban populations. Despite increasing recognition of their importance, knowledge gaps remain regarding UF-NbS implementation, particularly with respect to their performance, their perception, and on decision-making and governance practices for their implementation and management. Grounded in a project-as-practice approach and based on sixteen UF-NbS case histories, this paper seeks to gain insights into UF-NbS project actualities by an identification of characteristic trends as a function of a projects' scope and purpose, or challenge-orientation, respectively. A particular emphasis is on project structure and coordination, on the scope and depth of participation and stakeholder involvement, and on funding mechanisms. Identified trends reveal centrally coordinated, single-responsible public authorities as the most common project structure, but with certain feature contents, i.e., regeneration and reclamation, as being associated with more decentralised forms of governance. It is concluded that irrespective of challenge-orientation, comparatively broad participation appears to be realised within the UF-NbS framework, however, the depth of participation differs considerably. With respect to funding, a strong reliance on public capital is asserted for the UF-NbS context, however, various forms of private contributions appear reasonably common across the assessed case histories. Recommendations for policy-making and avenues of future research are identified, including the validation of identified trends, the fostering of collaboration, the dispersal of decision-making authority, the encouragement for implementing non-tokenistic modes of participation in UF-NbS governance, and the promotion of potentially under-utilised funds. • The governance of urban forests as nature-based solutions has been investigated. • Analysis of sixteen case histories grounded in a project-as-practice approach. • Identification of associations of governance features with challenge-orientations. • Recommendations for policymaking to improve the governance of urban forests. • Avenues for future research highlighted to promote project-based knowledge exchange. [ABSTRACT FROM AUTHOR]

While non-operating agricultural and absentee forest landowners across the U.S. and Europe are an important group of landowners, our understanding of them remains relatively limited. In this paper, we conduct a systematic literature review on these landowners to encapsulate a current lay of the land in terms of what we know about these landowners and move the dialogue on this topic forward. Eighty-one articles are identified in our search of empirical literature. For each of the landowner types, we discuss their demographics and the three primary themes that emerged related to land management: participation in land management decisions, attitudes regarding land use and ownership, and resource needs in working with these landowners. For agricultural non-operating landowners, we find limited participation in land management decisions, particularly among women, a variety of individual and social factors play a role in involvement, and while they have pro-conservation attitudes, implementation of conservation practices is more limited. Absentee forest landowners we find are more willing to use management plans, yet less willing to engage in active management and risk reduction. These landowners have a range of attitudes regarding land use, with studies highlighting recreation, conservation, and profit motivations. Our review concludes with identifying specific needs for more research and outreach on these landowners. • Systematic review of 81 papers on non-operating agricultural and absentee forest landowners. • Agricultural landowners have limited participation in land management decisions. • Forest landowners use management plans more than active management practices. • More information and outreach, for women landowners in particular, is needed. • We need additional research (especially qualitative) focused on these two groups. [ABSTRACT FROM AUTHOR]

Incineration is a promising disposal method for sewage sludge (SS), enriching more than 90% of phosphorus (P) in the influent into the powdered product, sewage sludge ash (SSA), which is convenient for further P recovery. Due to insufficient bioavailable P and enriched heavy metals (HMs) in SSA, it is limited to be used directly as fertilizer. Hence, this paper provides an overview of P transformation in SS incineration, characterization of SSA components, and wet-chemical and thermochemical processes for P recovery with a comprehensive technical, economic, and environmental assessment. P extraction and purification is an important technical step to achieve P recovery from SSA, where the key to all technologies is how to achieve efficient separation of P and HMs at a low economic and environmental cost. It can be clear seen from the review that the economics of P recovery from SSA are often weak due to many factors. For example, the cost of wet-chemical methods is approximately 5∼6 €/kg P, while the cost of recovering P by thermochemical methods is about 2∼3 €/kg P, which is slightly higher than the current P fertilizer (1 €/kg P). So, for now, legislation is significant for promoting P recovery from SSA. In this regard, the relevant experience in Europe is worth learning from countries that have not yet carried out P recovery from SSA, and to develop appropriate policies and legislation according to their own national conditions. [Display omitted] • Sewage sludge ash (SSA) is an alternate P source for fertilizer production. • The key to recovering P from SSA is the separation of heavy metals. • Wet-chemical methods are more common in current industrial applications. • Thermochemical methods are more economical for recovering P. • Legislation is significant for promoting P recovery from SSA. [ABSTRACT FROM AUTHOR]

Recently, a food fraud regarding tuna samples has been detected in Europe. Some batches of tuna treated with illegal adulterants like vegetable extracts, including beetroot, were detected after several cases of food poisoning. This paper proposes a new fast and non-destructive technique based on smartphone imaging which contributes to the fight against tuna fraud. The color of different samples of three species of tuna (Thunnus thynnus , Thunnus albacares and Thunnus obesus) has been analyzed by a colorimetrically characterized smartphone. Descriptive analysis of the samples shows that different species of tuna can be grouped by their color in CIELAB space, and that samples adulterated with beetroot extracts can be detected by the proposed image processing procedure. A logistic regression model was implemented to distinguish between real and fraudulent samples, and its suitability checked by k-folding cross validation (n = 189), achieving a 0.59% false positive rate with a 10% false negative rate. • A new smartphone-based protocol was developed to identify adulterated tuna samples. • The device was characterized to correctly quantify colour in the working range. • Corrected CIELAB data was used to build a chemometric classifier. • Results were validated by cross validation and 98% of success was observed. • A fast, cheap, and non-invasive method is proposed to fight food fraud. [ABSTRACT FROM AUTHOR]

Investment products labelled as sustainable, as well as regulations on sustainable finance, such as the EU taxonomy for sustainable activities, are on the rise globally. While some of these products and regulations include forests and forestry, the forest–sustainable finance nexus is largely unexplored in academic research. This paper systematically analyses the emerging expert debate spanning across the financial and forest sectors. We conducted 51 in-depth qualitative interviews with experts from financial institutions, timberland and impact investors, international organizations, civil society organizations and academia. We chose mainly experts from Europe, as one of the regions spearheading the topic globally. Based on these, we identify five main narratives on the nexus between sustainable finance and forests. These narratives are strikingly different regarding such dimensions as emphasis on risks versus opportunities, preference for public versus private governance and investments, as well as on the sustainability of forest-related investments per se. While financial sector experts are mainly concerned about financial risks, and only partially about deforestation risks, forest sector experts with financial expertise promote investment opportunities either for the asset class, or to increase private investment in tropical forests. In contrast, some experts from both the forest and financial sectors explicitly exclude forests as investable assets for the private sector, seeing them instead as pure public goods. We conclude with underlining the importance of more cross-sectoral dialogue, but also research, to both critically assess and advance the role of sustainable finance policy and practice in supporting forest conservation, restoration, and sustainable management. • We analyse the link between sustainable finance and forests based on 51 expert interviews. • Five distinct narratives can be distinguished, differing strongly regarding several dimensions. • Differences include varying risk/opportunity, private/public governance, and forest/sustainability emphases. • Financial sector experts prefer mitigating financial risks, and partially deforestation ones. • Forest sector experts aim to increase investment opportunities. [ABSTRACT FROM AUTHOR]

Integrative forest management approaches, aiming to combine the provision of multiple forest ecosystem services in the same forest area, are popular forest management concepts in Europe. Their understanding and application varies, however, across the continent. This paper looks at one dimension of integrative forest management approaches in particular – the integration of nature conservation measures into forest management; focusing on its understanding and application, as well as current and future social, technological, ecological, economic and political factors enabling or hampering this integration. Drawing on 42 qualitative in-depth interviews with national experts and forest practitioners, our study provides insights into the integration of nature conservation measures into forest management systems aimed at wood production and the provision of other forest ecosystem services under various conditions. Across the investigated countries, the main factors perceived to facilitate this integration are the personal motivations and knowledge of forest managers and their long-term economic thinking related to the resilience of the forest in the face of climate and societal change. In turn, the main factors perceived as hampering the integration are current wood-market demands, and a lack of (public) financial incentives. Public pressure is also perceived as an important influencing factor, which can both impede or support integration. Other ambiguous factors include societal knowledge and related knowledge gaps, relationships between local stakeholders, and the legal framework in which forest management operates. The study concludes with suggestions of how to enhance the uptake of the integration of nature conservation measures into forest management in Europe. • Societal pressure seen as an important driver for integrative approaches. • Societal pressure perceived to impact both uptake and method of conservation measures. • Intrinsic motivation of foresters and economic sustainability support measure uptake. • The wood market and lack of public finances hamper the integration of nature conservation. • Tension between uptake of integrative approaches and economic goals reported. [ABSTRACT FROM AUTHOR]

Adverse health effects from extreme heat remain a major risk, especially in a changing climate. Several European countries have implemented heat health action plans (HHAPs) to prevent ill health and excess mortality from heat. This paper assesses the state of implementation of HHAPs in the WHO European Region and discusses barriers and successes since the early 2000s. The results are based on a web-based survey among 53 member states on the current national and federal HHAPs in place. Guided by the eight core elements of HHAPs as outlined by the WHO Regional Office for Europe guidance from 2008, we analyzed which elements were fully or partially implemented and which areas of improvement countries identified. HHAP adaptations to account for COVID-19 were sought via literature search and expert consultations. 27 member states provided information, of which 17 countries reported having a HHAP. Five out of eight core elements, namely agreement on a lead body, accurate and timely alert systems, heat-related health information plans, strategies to reduce health exposure, and care for vulnerable groups, were at least partially implemented in all 17 plans. Alert systems were implemented most often at 94%. The least often implemented items were real-time surveillance, long-term urban planning, and preparedness of health and social systems. Five countries had published COVID-19 guidance online. Our findings suggest a progressive improvement in the development and rollout of HHAPs overall and awareness of vulnerable population groups in WHO/Europe, while integration of HHAPs into long-term climate change and health planning remains a challenge. [ABSTRACT FROM AUTHOR]

This paper contributes to the debate on Europe's modern economic growth using the statistical concept of long-range dependence. Different regimes, defined as periods between two successive endogenously estimated structural shocks, matched episodes of pandemics and war. The most persistent shocks occurred at the time of the Black Death and the twentieth century's world wars. Our findings confirm that the Black Death often resulted in higher income levels but reject the view of a uniform long-term response to the Plague. In fact, we find a negative impact on incomes in non-Malthusian economies. In the North Sea Area (Britain and the Netherlands), the Plague was followed by positive trend growth in output per capita and population, heralding the onset of modern economic growth and the Great Divergence in Eurasia. [ABSTRACT FROM AUTHOR]

In research and policy design we mainly use a 'population weighted average concentrations' perspective to study changes in air quality, to evaluate if past policies have been effective, or to assess the impact of future air quality plans. This angle is useful and informative, but sometimes masks other important patterns. In this paper we propose to add, to the existing population weighted average point of view, a new indicator that brings to the fore the 'inequalities' in exposure. This inequality indicator is based on the Gini coefficient, usually applied in Economics and here considered to evaluate if exposure to air pollutants is equally distributed among population. A case study for this new indicator is then proposed, to assess the evolution of exposure to air pollutants in Europe from 2000 to 2018, in terms of both average exposure and inequality levels. The results show that using only average exposure metrics can mask other interesting patterns, and confirm the benefits of including this alternative perspective into the analysis. [ABSTRACT FROM AUTHOR]

The major event that hit Europe in summer 2021 reminds society that floods are recurrent and among the costliest and deadliest natural hazards. The long-term flood risk management (FRM) efforts preferring sole technical measures to prevent and mitigate floods have shown to be not sufficiently effective and sensitive to the environment. Nature-Based Solutions (NBS) mark a recent paradigm shift of FRM towards solutions that use nature-derived features, processes and management options to improve water retention and mitigate floods. Yet, the empirical evidence on the effects of NBS across various settings remains fragmented and their implementation faces a series of institutional barriers. In this paper, we adopt a community expert perspective drawing upon LAND4FLOOD Natural flood retention on private land network (https://www.land4flood.eu) in order to identify a set of barriers and their cascading and compound interactions relevant to individual NBS. The experts identified a comprehensive set of 17 barriers affecting the implementation of 12 groups of NBS in both urban and rural settings in five European regional environmental domains (i.e., Boreal, Atlantic, Continental, Alpine-Carpathian, and Mediterranean). Based on the results, we define avenues for further research, connecting hydrology and soil science, on the one hand, and land use planning, social geography and economics, on the other. Our suggestions ultimately call for a transdisciplinary turn in the research of NBS in FRM. [Display omitted] • The European expert community perspective on nature-based solutions is presented. • 12 groups of nature-based solutions relevant to flood risk management are defined. • 17 implementation barriers for the 12 nature-based-solution groups are identified. • Cascading and compound barriers call for a transdisciplinary approach to floods. [ABSTRACT FROM AUTHOR]

The European Human Biomonitoring Initiative (HBM4EU) is coordinating and advancing human biomonitoring (HBM). For this purpose, a network of laboratories delivering reliable analytical data on human exposure is fundamental. The analytical comparability and accuracy of laboratories analysing flame retardants (FRs) in serum and urine were investigated by a quality assurance/quality control (QA/QC) scheme comprising interlaboratory comparison investigations (ICIs) and external quality assurance schemes (EQUASs). This paper presents the evaluation process and discusses the results of four ICI/EQUAS rounds performed from 2018 to 2020 for the determination of ten halogenated flame retardants (HFRs) represented by three congeners of polybrominated diphenyl ethers (BDE-47, BDE-153 and BDE-209), two isomers of hexabromocyclododecane (α-HBCD and γ-HBCD), two dechloranes (anti-DP and syn-DP), tetrabromobisphenol A (TBBPA), decabromodiphenylethane (DBDPE), and 2,4,6-tribromophenol (2,4,6-TBP) in serum, and four metabolites of organophosphorus flame retardants (OPFRs) in urine, at two concentration levels. The number of satisfactory results reported by laboratories increased during the four rounds. In the case of HFRs, the scope of the participating laboratories varied substantially (from two to ten) and in most cases did not cover the entire target spectrum of chemicals. The highest participation rate was reached for BDE-47 and BDE-153. The majority of participants achieved more than 70% satisfactory results for these two compounds over all rounds. For other HFRs, the percentage of successful laboratories varied from 44 to 100%. The evaluation of TBBPA, DBDPE, and 2,4,6-TBP was not possible because the number of participating laboratories was too small. Only seven laboratories participated in the ICI/EQUAS scheme for OPFR metabolites and five of them were successful for at least two biomarkers. Nevertheless, the evaluation of laboratory performance using Z-scores in the first three rounds required an alternative approach compared to HFRs because of the small number of participants and the high variability of experts' results. The obtained results within the ICI/EQUAS programme showed a significant core network of comparable European laboratories for HBM of BDE-47, BDE-153, BDE-209, α-HBCD, γ-HBCD, anti-DP, and syn-DP. On the other hand, the data revealed a critically low analytical capacity in Europe for HBM of TBBPA, DBDPE, and 2,4,6-TBP as well as for the OPFR biomarkers. • The HBM4EU QA/QC programme showed the state of play in FR biomonitoring in Europe. • Four rounds of ICI/EQUAS were performed for ten HFRs and four OPFRs biomarkers. • The highest number of successful laboratories was for BDE-47 and BDE-153. • The analytical capacity for HBM of OPFR biomarkers was lower than for HFRs. [ABSTRACT FROM AUTHOR]

Post-consumer waste plastics that cannot be mechanically recycled represent a concerning environmental issue. According to the latest available data for Europe, as much as 25% of collected post-consumer waste plastics are landfilled, 43% is energy recovered, and 32% is recycled. One possible way of recovering non-recyclable plastics is pyrolysis, which is considered environmentally friendly technology for obtaining fuel or chemicals from plastic waste. To tackle the challenge of recovering non-recyclable plastics via pyrolysis, it is necessary to determine their actual composition. Visual separation of collected non-recyclable plastics was performed, and Fourier-transform infrared spectroscopy was used to confirm the accuracy of visual separation. A significant amount of plastics labelled as "other" was found. Since the composition of "other" waste plastics has not been sufficiently investigated, relatively few studies on their pyrolysis have been conducted. Therefore, they were characterised and added to the mixture with other found polymer types of non-recyclable plastics. Thermogravimetric analysis was conducted to determine thermochemical behaviour and kinetic parameters required for laboratory pyrolysis investigation. Kinetic analysis was conducted using the Friedman isoconversional model-free method and non-linear multivariate regression method. The goal of this paper was to analyse the kinetics, determine the product yield and characteristics of the pyrolysis process of non-recyclable plastics over zeolite catalysts. It was found how the decomposition of non-recyclable plastics occurs in two decomposition steps. The activation energy of non-recyclable plastics was 144 kJ/mol in the first stage of decomposition and 262 kJ/mol in the second stage of decomposition. It decreased by 34% and 6.5% after fresh fluid catalytic cracking catalyst was added and 41% and 18.3% with iron-modified Zeolite Socony Mobil-5 catalyst. The yield of condensate was 55% (wax) for the original sample, and it decreased to 50% (wax and oil) and 27% (mostly oil) with fresh fluid catalytic cracking and iron modified Zeolite Socony Mobil-5 catalysts. Processes with catalysts promoted the formation of olefins and aromatic compounds in pyrolytic oil. All pyrolysis products had a high value of higher heating value ranging from 39 MJ/kg to 43 MJ/kg showing good potential for further energy use. • Pyrolysis of non-recyclable plastics was studied in absence and presence of catalysts. • With the addition of catalysts the activation energy of non-recyclable plastics significantly decreased. • Aromatic and olefinic compounds predominantly formed in the presence of catalysts. • Catalysts have greatly affected the viscosity of pyrolysis condensate (from wax to oil). • High value of higher heating value shows good potential for further energy use. [ABSTRACT FROM AUTHOR]

In Europe, regions in the Mediterranean area share common characteristics in terms of high sensitivity to climate change impacts. Does this translate into specificities regarding climate action that could arise from these Mediterranean characteristics? This paper sheds light on regional and local climate mitigation actions of the Mediterranean Europe, focusing on the plans to reduce greenhouse gases emissions in a representative sample of 51 regions and 73 cities across 9 Mediterranean countries (Croatia, Cyprus, France, Greece, Italy, Malta, Portugal, Slovenia, Spain). The study investigates: (i) the availability of local and regional mitigation plans, (ii) their goals in term of greenhouse gas emissions reduction targets on the short and medium-long term, and (iii) the impact of transnational climate networks on such local and regional climate mitigation planning. Results of this study indicate an uneven and fragmented planning, that shows a Mediterranean West-East divide, and a link with population size. However, overall, both regional and city action seem insufficiently ambitious with regards to meeting the Paris Agreement, at least at city level. While national frameworks are currently weak in influencing regional and local actions, transnational networks seem to be engaging factors for commitment (at city level) and ambitiousness (at regional level). The uneven and fragmented progress revealed by this study, does not align with the characteristics shared by investigated regions and cities in terms of environmental, socio-political, climatic and economic conditions. The results support the call of a common green deal at the Mediterranean level to further address specific Mediterranean challenges and related needs. This will allow to capitalise on available resources, generate local-specific knowledge, build capacities, and support Mediterranean regions and cities in preparing the next generation of more ambitious mitigation plans. [Display omitted] • Analysis of mitigation plans of 51 regions and 73 cities in Mediterranean Europe. • Uneven progress, with West-East divide and a generally modest short-term ambition. • Bigger size Mediterranean regions and cities show higher climate action. • Mitigation planning is affected by national regulation and transnational networks. • There is a case for cross-border cooperation among Mediterranean regions and cities. [ABSTRACT FROM AUTHOR]