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Solar and wind power systems have been prime solutions to the challenges centered on reliable power supply, sustainability, and energy costs for several years. However, there are still various challenges in these renewable industries, especially regarding limited peak periods. Solar–wind hybrid technology introduced to mitigate these setbacks has significant drawbacks and suffers from low adoption rates in many geographies. Hence, it is essential to investigate the challenges faced with these technologies and analyze the viable solutions proposed. This work examined solar–wind hybrid plants' economic and technical opportunities and challenges. In the present work, the pressing challenges solar–wind hybrids face were detailed through extensive case studies, the case study of enabling policies in India, and overproduction in Germany. Presently, the principal challenges of solar–wind hybrids are overproduction, enabling policies, and electricity storage. This review highlights specific, viable, proposed solutions to these problems. As already recorded in the literature, it was discovered that academic research in this space focuses majorly on the techno-economic and seemingly theoretical aspects of these hybrid systems. In contrast, reports and publications from original equipment manufacturers (OEMs) and engineering, procurement, and construction engineers (EPCs) are more rounded, featuring real-life application and implementation. [ABSTRACT FROM AUTHOR]

Supermarkets play an important role in industrialized food systems, which is why many in academia, politics, industry, and civil society view them as key players in transforming the food system toward greater sustainability. We analyse narratives and proposed solutions in this context, as well as the role of supermarkets in Germany, home to some of the largest retailers worldwide. We show that many actors in the German food system, including supermarkets themselves, perceive the structural problems of overproduction and dysfunctional markets as major obstacles to achieving food system transformation. Despite this, they tend to propose solutions focused on optimization and efficiency in supermarket logistics and retail management or greater consumer awareness. These solutions show little transformative potential. Regarding the structural problem of dysfunctional markets, supermarkets are perceived to be in a quandary due to the drive for profits, competitive markets, and consumer demand. Thus, supermarkets are not likely to drive a transformation of the food system. However, a broadly shared understanding of the core problems of overproduction and dysfunctional markets presents an opportunity for 'discourse coalitions' to push for more systemic solutions. The findings may enhance food system stakeholders' understanding of the need for more holistic approaches to addressing sustainability. • German debates highlight systemic barriers to sustainability, including overproduction. • Yet, solutions focus on market-driven improvements in efficiency and changes in demand. • Supermarkets prioritize these market-driven solutions over systemic change. • A lack of policy frameworks hinders wholesale reform. • Promoting debates on overproduction could fuel systemic change. [ABSTRACT FROM AUTHOR]

From the standpoint of capitalism in Germany, the European Union and the Eurozone are but the two most recent stations on the long pilgrimage to find a spatial fix, attempts to alleviate the perennial problem of a nationally-based centre of capital accumulation, bursting the bounds of its home market, but without easy access to overseas empire. But these 'spatial fixes' - from Bismarckian imperialism on - have occurred undemocratically, have fostered chauvinism and racism, and have remained trapped in the fetishised forms which are the curse of private-property. All of these superstructural impediments have become prisons, holding back social development in Germany and throughout Europe. This paper will develop these themes through a survey of three distinct 'moments' in the search for a spatial fix to the contradictions inherent in German and European capitalism. [ABSTRACT FROM AUTHOR]

The article first presents a typology of healthcare systems based on funding methods and supply contracts and, challenging often presumed performance differences, points to the need for detailed case analysis. The provision of healthcare and insurance typically reflects demand-side and supply-side distortions that prevent competitive markets from functioning effectively. Additional governance mechanisms are needed to ensure an efficient and equitable level of supply.