Abstract
ABSTRACT The transition to the water circular economy (WCE) requires several stakeholders' awareness, articulation, and action involving complex governance concerns. As a participatory approach to identifying problems, designing solutions, and implementing strategic actions, the co-creation process should support stakeholder involvement to adjust existing institutional arrangements to foster the WCE. This article designs and applies a co-creation process to analyse the perception of key stakeholders about institutional challenges for water reuse and explore their contributions to innovate policy, planning, and governance for the implementation of new water reuse technology in Almendralejo (Spain), Lecce (Italy), Omis (Croatia), and Eilat (Israel). The findings indicate that implementing a new water loop encounters complex institutional and production-related obstacles, which different stakeholders address in varying ways. Moreover, the proposed solutions to the on-site issues identified emphasise the need for actions that foster engagement and collaboration, particularly to enhance awareness, training, and regulation. Addressing these challenges associated with adopting new water loops, even when technical, may depend on non-technical solutions regarding the institutional framework. The co-creation processes highlight the importance of focusing on institutional arrangements and stakeholder awareness while implementing new water loops to ensure and promote symbiotic territories that consider the policy, producers, and users' strategies.

Abstract
Water scarcity and security drive attention to water reuse in policy and business. However, water reuse may generate new water loops and challenge water governance with new and different types of water, risks, involved actors, and responsibilities. These challenges demand robust institutional arrangements related to water governance. This article assesses the institutional arrangements associated with four case studies in Spain, Italy, Croatia, and Israel. The findings reveal that the more diverse the water uses and users, the more challenges and risks, particularly those associated with institutional arrangements such as quality standards, sanctions, and conflict prevention, are likely to emerge. The weaknesses of governance models and regulations to deal with changes, uncertainties, and public resistance call for special attention to the design of the institutional arrangements before the adoption. Independent of the type of technology adopted, governance may be improved by ensuring internal and external water monitoring; integrating water management with spatial concerns; improving training, expert engagement, and civil society awareness; and reducing water reuse costs. In addition, alternative models that guarantee the efficiency of governance in attaining objectives and assuring the participation of new water users in the management of water reuse loops may also improve governance.

Abstract
The transition to a circular water economy by water reuse has many drivers and barriers. Facing them requires integrated approaches where new water users and producers are considered under a water–land nexus. Policies, regulations, and plans foreseeing water circularity are critical factors for a successful transition. However, little is known about how policy and planning contexts consider water circularity. This chapter develops an analytical framework based on a typical decision-making arena and a set of enabling factors used to analyze selected policy and planning documents, namely circular economy action plans, water and spatial planning frameworks, and water and spatial plans. This analytical framework is then applied to assess how the current policy and planning the set-up of three municipalities located in southern European countries, namely Almendralejo (Spain), Lecce (Italy), and Omis (Croatia), are prepared to facilitate new water circular economy initiatives. The findings bring to the fore very different settings. Although the policy, regulations, and plans recognize the water–land nexus, the integration of circularity codes still needs to be fostered. © 2023 Elsevier Inc. All rights reserved.

Abstract
The Brazilian oil industry is facing a period of significant techno-economic challenges to meet the increase in reserves and production in ultra-deep waters. The subsea production system is an essential technological frontier to ensure the technical and economic viability of oil fields. Thus, the use of digital technologies fits in with these goals and already shows promising results, which stimulate companies in the development of digitalization. For this, the main aim of this chapter is to investigate the role of digital transformation to the subsea productive system of the Brazilian oil industry. By using the analytical and theoretical framework of innovation system, the author explores the relevance, capacity, and strategy developed for the use of digital transformation into subsea production system activities. It was possible to identify the critical features of techno-economic development and conclude that despite the existing capacity, coordination, interactions, and funding are issues to be promoted and improved.

Abstract
O principal objetivo do artigo é apresentar as linhas gerais da importância da indústria petrolífera para a Venezuela a partir do estudo da tentativa de expansão produtiva e urbana em direção à faixa centro-oriental do território nacional sob os objetivos do Projeto Socialista do Orinoco (PSO). Baseado em revisão da literatura e análise de dados secundários, o trabalho discute a proposta de adensamento urbano e diversificação produtiva comandada pela grande indústria de petróleo, assinalando seus objetivos, suas características e os desafios enfrentados. O texto conclui que a proposta de crescimento econômico e diversificação, baseada na indústria de petróleo, mostrou-se frágil pela alta dependência inicial à conjuntura internacional favorável e por não conseguir superar problemas estruturais crônicos de longa data que afetam o país, tal como a valorização cambial, que atua no desestímulo à substituição de importações.