Lit Review · claude-opus-4-7

Literature Review: How Renewable Energy Is Adopted in Mid-Sized Cities Renewable energy is arguably the defining issue of the twenty-first century, as cities around the globe try to grapple with climate change, energy security, and environmental sustainability. While a good amount of research has focused on renewable energy adoption in megacities and rural areas, relatively little has been directed towards mid-sized cities: defined as cities with populations between 100,000 and 500,000 people (The United States Census Bureau, 2021). However, since the population in mid-sized cities accounts for almost a third of the total world population and a significant percentage of energy use, it is important to know whether the patterns in renewable energy adoption for these cities differ from other cities and what factors could be driving this process. Scholars have pointed out that mid-sized cities have a number of characteristics that make them stand out from other cities. For example, Bulkeley and Betsill (2013) suggest that they typically have more flexibility in the local government and communities and therefore the capacity to innovate and experiment with new policies. On the other hand, Hoppe et al. (2015) argue that they tend to lack access to resources (e.g., funding) and expertise (e.g. technology) that large cities have in abundance and are therefore more vulnerable to market failure. Therefore, a good deal of research has been done to understand the conditions under which these cities can overcome these barriers and embrace renewables. For instance, several studies emphasize the role of multi-level governance in adoption of renewables in mid-sized cities. Kern and Rogge (2018) find that mid-sized cities depend more on the national framework and regional collaboration in comparison to large cities to overcome their capacity limitations. They also show that these cities face stronger economic constraints in adopting renewables than their counterparts due to their smaller tax bases and higher per capita debt. In addition, a number of studies point to the important role that local community can play in shaping adoption in renewables, particularly in mid-sized cities. Seyfang et al. (2014) highlight that social capital, such as civic participation and sense of belonging, is likely to be more important than in large cities where community groups tend to have less influence on municipal decision-making. Despite this recent progress, several gaps remain in current research. First, most studies on renewable energy adoption in mid-sized cities focus on the experiences of cities in Western Europe and North America. Thus, there is not a clear picture of how the experiences in Global South cities differ and are generalizable. Second, there are not many comparative studies that look at mid-sized cities across a variety of contexts that allow us to understand common patterns of adoption and barriers. Thus, the purpose of the current literature review is to present and analyze the research on renewable energy adoption in mid-sized cities. This literature review also highlights some common themes in research in adoption of renewable energy, such as barriers and drivers, and provides recommendations for future research to advance our understanding of renewable energy adoption in mid-sized cities.

Climate change, energy security, and other environmental concerns have led countries all over the world to shift to renewable energy sources. While much research has focused on renewable energy adoption in larger urban areas and rural regions, less attention has been paid to renewable energy adoption in mid-sized cities. Mid-sized cities account for a large share of the world’s urban population and energy consumption. This niche in research is essential to understand since mid-sized cities can be pivotal in reaching countrywide and global climate goals. In the literature surrounding mid-sized cities’ renewable energy adoption, a few commonalities have been presented. On one hand, Bulkeley and Betsill (2013) found that due to smaller size and quicker response times, mid-sized cities are able to experiment with policies at a faster rate. On the other hand, barriers such as less available capital and renewable industry standardization make renewable energy adoption more difficult for mid-sized cities (Hoppe et al., 2015). With both advantage and disadvantage existing for mid-sized cities, there has been growing research interest in when and how these cities are able to transition to renewable energy. Some of the more recent studies have found that although these cities lack capacity to act on their own accord, many are able to shift to renewable energy with the support of multi-level governance systems (Kern & Rogge, 2018). Other literature has focused on energy at the community level, finding that in smaller, more local communities social ties have an increased impact on energy decisions (Seyfang et al., 2014). While these studies have presented valuable insight into renewable energy adoption by mid-sized cities, there is still much to be answered. A majority of these studies use case studies from Western Europe and North America. While there is literature on renewable energy adoption in mid-sized cities in developing countries, comprehensive comparisons between Western and non-Western cities are seldom made. This paper will review literature regarding renewable energy adoption in mid-sized cities. Through understanding the commonalities between political, social, economic, and technological factors among these studies, this literature review will attempt to present how mid-sized cities are able to contribute to the worldwide transition to renewable energy and where there is room to further research this topic.

Review of the literature: adopting renewable energy in medium sized cities In the 21st century, there is an urgent need for countries around the world to transition to a renewable energy future due to concerns over climate change and a rise in demand for energy security and sustainable urban development. Although the uptake of renewable energy technologies (RETs) in mega-cities and in rural areas have been broadly studied by many researchers, the situation of medium sized cities – those having a population ranging from 100,000 to 500,000 - is critical but not fully explored in the context of a global energy transition. Medium sized cities comprise a significant proportion of the global urban population and they represent a major hub of energy demand so that they cannot be ignored if the objectives of renewable energy deployment on a national and international level are to be achieved. Based on the relevant literature, medium sized cities exhibit certain characteristics that distinguish them from larger metropolitan areas and influence their energy transition pathways. Indeed, while Bulkeley and Betsill (2013) affirm that they may have a more streamlined administration and a greater capacity for community engagement which facilitate rapid policy experimentation, they can also be confronted with specific obstacles such as financial limitations, the absence of expertise and the reduced accessibility to renewable energy markets (Hoppe et al., 2015). This dual role of a key element but also of an area prone to vulnerabilities makes it a significant site for exploring a number of conditions under which an energy transition in medium sized cities can occur. The relevance of the role of multi-level governance in adopting renewable energy was highlighted in recent years. The research of Kern and Rogge (2018) showed how local governments in medium sized cities often depend on support from the state and on collaboration between different geographical scales, because they lack in capacity; at the same time, studies on community-driven projects in renewable energy seem to underline that the social and community capital have an importance in small towns more than any otherwhere (Seyfang et al., 2014). However, there are also research gaps that remain. Firstly, most of the studies available in the literature are about medium sized cities in Europe and North America and their findings might not be transferable to similar urban settlements in the Global South. Secondly, cross-comparative analyses across diverse regions and economies have been limited and more general frameworks on adoption pathways have to be formulated. This paper will aim to provide an up to date overview of the literature on medium sized cities’ renewable energy adoption, looking at technical, political, economic and social dimensions, and seeking to define how medium sized cities can contribute to the world energy transition by overcoming obstacles and promoting best practices; to achieve this aim, it would be necessary to identify the drivers and barrier specific of these cities in order to pave the way for future research directions.

# Literature Review: Renewable Energy Adoption in Mid-Sized Cities The twenty-first century demands a focus on the imperative of adopting renewable energy. It has become a global priority with the development of a more sophisticated understanding of climate change, the effects of it on human settlement, the energy security, and the more sustainable paradigm of urban development. There has been much interest in the deployment of renewable energy in megacities and the wider rural areas. However, the critical but neglected role of mid-sized cities in the global energy transition is acknowledged. Mid-sized cities typically fall in the range of urban populations between 100,000 and 500,000. These urban areas are home to a considerable segment of the global urban population and represent significant energy consumption. Therefore, cultivating renewable energy in these urban areas will be desirable for realizing climate change goals both nationally and internationally. The existing body of literature contends that mid-sized cities are clearly differentiated from larger metropolitan areas in the ways that enable or inhibit the adoption of renewable energy. Bulkeley and Betsill (2013) point to the administrative and community agility of small and mid-sized urban areas, which allows for rapid policy innovation. However, there are numerous barriers like the lack of finances and human resources and limited access to the renewable energy market and technology (Hoppe et al., 2015). These enable and inhibit barriers have motivated the research of mid-sized cities and renewable energy systems. Scholars have noted the role of multi-level governance in local renewable energy initiatives. Kern and Rogge (2018) show mid-sized cities rely on national and regional levels to address gaps in capacity. However, research on community energy (Seyfang et al., 2014) suggests local social capital and community involvement are key in smaller cities, as they are better positioned to affect local council decisions. There are limits to the additional literature. Most research focuses on North America and Western Europe, and it is not clear how these findings would relate to mid-sized cities in the Global South. There are also not many studies comparing the different geographies and economies, thus preventing the creation of frameworks to predict and explain. This review builds on the current research on mid-sized cities and their participation in renewable energy initiatives. It looks at the potential and existing drivers and barriers and best practices to show how mid-sized cities are valuable participants in the global energy transition and the possibilities for further research in this area.

# Literature Review: Renewable Energy Adoption in Mid-Sized Cities Research on renewable energy systems has become more and more important in order to combat climate change, to secure the energy supply and to support sustainable urban development. Most of the studies dealing with renewable energy systems are concentrated on big cities as well as on rural areas. The renewable energy transition in mid-sized cities, i.e. settlements with 100,000 to 500,000 inhabitants, is not in the focus of interest of many studies so far, although the group of mid-sized cities comprises a large part of the world population and thus is an important field for energy consumption as well as for the corresponding transition pathways to reach national and international climate goals. For mid-sized cities, the variety of development paths can be very useful for research. On the one hand, there are the specific characteristics of these cities as opposed to very large metropolitan regions. Bulkeley and Betsill (2013) discussed the advantages of smaller cities in terms of administrative flexibility and social capital, and how these can be used to test out new approaches and measures in order to deal with local challenges. On the other hand, there are a number of financial, technical and market problems that make it more difficult for the smaller towns and cities than for the larger cities to switch to renewable energy. There is, however, a vast amount of research that looks at the process of renewable energy transition in individual cities all around the world. Recent studies also increasingly focus on the role of multi-level governance in medium-sized cities for renewable energy adoption. As Kern and Rogge (2018) argue for smaller cities, supportive national frameworks and co-ordination at the regional level play a decisive role. Within local contexts, however, community energy is more likely to thrive in medium-sized cities with high social capital and civic engagement. In such cities local energy initiatives can more easily influence urban policy than in large metropolitan areas (Seyfang et al., 2014). There is a significant gap in the current body of research when it comes to an analysis of renewable energy adoption in mid-sized cities all around the globe. The majority of current studies on renewable energy are based on Western countries (especially Europe and the United States of America). In contrast, there is a lack of studies on countries from the Global South. An even larger gap of research can be identified when it comes to a comparison of renewable energy adoption among mid-sized cities of very different geographical and economic structures. This review aims to help to develop frameworks for future research on renewable energy adoption in mid-sized cities all around the world. The literature review for this project will provide a comprehensive overview of current knowledge for renewable energy adoption in medium-sized cities from a technological, political, economic and social perspective. The literature review will attempt to identify the driving factors as well as the current barriers to renewable energy adoption in medium-sized cities world-wide. The literature review will also try to outline current best practices for renewable energy adoption in medium-sized cities. In addition, the literature review will attempt to provide an assessment of the contribution that medium-sized cities can make to the global energy transition. Finally, the literature review will attempt to highlight future research needs for renewable energy adoption in medium-sized cities world-wide.

In the twenty-first century, the transition of major urban centres to renewable energy has become an urgent and critical challenge. However, existing research has not addressed the role of mid-sized cities in this transition. Mid-sized cities are generally understood to be those cities with populations ranging from 100,000 to 500,000, and they comprise a significant share of the world's urban population. Mid-sized cities are collectively significant actors in the global energy transition; research examining their future path can offer vital insights to the successful and widespread and transformative project of renewable energy transition to all urban centres in pursuit of climate goals. Some research indicates mid-sized cities have unique features that fundamentally alter their pressures for, and paths to, renewable energy adoption. “Small and medium-sized cities experiment more because the decision-making capacities sometimes allow for experimentation than in larger cities,” according to Bulkeley and Betsill (2013). Others studying mid-sized cities such as Hoppe et al. (2015) find some of the same disadvantages as other cities in their struggle for renewable energy transition: a lack of financial resources, a lack of the technical expertise in energy software and IT, and no access to the specialized markets that larger cities enjoy. Both promise and risk attune in a particular way in mid-sized cities. A growing body of research studying urban energy municipalities considers what such conditions are for successful adoption of renewables. More recently, some have turned to the kind of domestic governance that has shaped local adaptation of renewables, conducting analyses of mid-sized city adaptation of renewables (Kern and Rogge, 2018). As these describe, sometimes mid-sized cities lean even more heavily on state and national frameworks as well as “sustainability” efforts on the level of regions and neighbours. Where examining community personally engages in local renewable energy initiatives, some with the literature establish that “more is at stake” (Seyfang et al. 2014) “in smaller towns".

# The Literature on Transitioning to Renewable Energy in Mid-Sized Cities One of the most important challenges facing the world today is transitioning to renewable energy. There are many reasons for this, but among the top three are addressing the issue of climate change; ensuring energy security; and developing sustainable ways to build cities. While there have been numerous academic works focused on renewable energy in both megacities and rural settings, the renewable energy transitions occurring in mid-size cities (which typically contain 100,000 to 500,000 people) have received relatively little focus. As they house approximately half of all urban residents around the globe, mid-size cities represent large amounts of total urban energy usage; therefore, how quickly or slowly they adopt renewable energy is an important factor in meeting national or international climate goals. In addition to being large consumers of energy, mid-size cities have several unique features that shape their paths to adopting renewable energy. On one hand, Bulkeley and Betsill (2013) have noted that because of their small size compared to megacities, mid-size cities tend to be able to develop policies faster than larger cities; at the same time, according to authors like Hoppe et al. (2015), many mid-size cities continue to face serious constraints in terms of their ability to implement new technologies, such as solar panels or wind turbines, due to lack of funding, lack of technical knowledge and fewer opportunities to purchase advanced renewable technology products through special markets. Therefore, researchers have developed a large number of papers focusing on the conditions under which mid-size cities will succeed in implementing renewable energy systems. A recent area of interest in the field of studying renewable energy has been how multi-level government institutions support or hinder local renewable energy adoptions. Research done by Kern and Rogge (2018) indicates that while some mid-size cities may have the capacity to implement their own renewable energy systems, many others rely heavily on supportive national governments or regional partnerships in order to help them surmount institutional barriers. At the same time, research regarding community-based renewable energy initiatives (such as Seyfang et al. 2014) indicate that local social capital and civic involvement can significantly impact the likelihood of success in adopting renewable energy systems in mid-size cities. Grassroots movements can exert much greater influence in smaller urban environments. Despite the progress made in recent years toward a better understanding of renewable energy adoptions in mid-size cities, there are still significant holes within the literature. Most of what we currently know comes from case studies based upon experiences in Western Europe and North America. Thus, questions exist regarding whether our understanding of renewable energy adoptions would be applicable to mid-size cities located in other parts of the world. Additionally, few comparative studies have been conducted across different regions and economies, limiting the ability to generalize findings and develop models that can explain how adoption patterns vary. The purpose of this literature review is to synthesize available research related to renewable energy adoption in mid-size cities. It examines various dimensions of this process including technological issues; political factors; economic considerations; and social influences. Ultimately, by identifying commonly cited drivers of successful adoptions; long-standing barriers to implementation; and new best practices that have proven effective; the literature review seeks to provide clarity into how mid-size cities can uniquely contribute to the global effort to transition away from fossil fuel-based energy sources and identify productive avenues for further research.

# Literature Review: Renewable Energy Adoption in Mid-Sized Cities In the twenty first-century, one of the biggest challenges concerns the transition towards renewable energy; driven by growing needs of climate change, energy security, and sustainable urban development. Although substantial scientific research has been conducted on renewable energy in megacities and rural areas, mid-sized cities (with population levels ranging from 100,000 to 500,000) play a crucial but under-researched role in the global energy transition. Together, these cities are responsible for a large share of global urban population and are key centres of energy use which also have energy transition pathways that are crucial to national and international climate goals. The literature is void of one or the other, as existing literature points to unique characteristics some mid-sized cities have to distinguish their renewable energy trajectory from the larger municipalities. Bulkeley and Betsill (2013) state that smaller urban centres have shown more administrative agility and community cohesion, which can help to speed up policy experimentation. However, other researchers, like Hoppe et al. (2015), refer to continuing restrictions on financial capacities, a lack of specific technical know-how and less availability for special renewable energy markets. This dichotomy – opportunity and constraint – has inspired a considerable research interest to investigate the conditions that enable mid-sized cities to make the leap to renewable energy systems. In recent years, attention has focused on how multi-level governance affects the adoption of renewables at the local level. The research of Kern and Rogge (2018) shows that the small to mid-sized cities often rely on a supportive national framework and regional collaboration to compensate for capacity shortcomings. At the same time, research on community energy initiatives (Seyfang et al., 2014) proposes that social capital and civic engagement can have greater disproportionate influence in smaller urban settings in which grassroots campaigns may be better positioned to impact the agenda of the local administration. In spite of such contributions, there are still certain gaps in literature. Many of the current investigations are based on case studies from other countries in Western Europe and North America, with questions into the applicability of the results in mid-sized cities in the Global South. Additionally, few comparative studies have been done in different geographic and economic contexts that could help to build a general picture of how and why adoption rates vary across different places. This review aims at consolidating the existing research on mid-sized cities' renewable energy adoption, while looking at technological, political, economic, and social aspects. It aims to reveal common themes, ongoing obstacles, and emerging good practice to tease out the unique opportunities for mid-sized cities to engage in the global energy transition and to identify fruitful avenues for future research.

In literature review based on empirical data for application of renewable energy in mid-sized cities The shift towards renewable energy resources is proving to be one of the most urgent priorities of this century — influenced by growing worries surrounding climate change, energy security and sustainable cities. Though much scholarship has focused on harnessing renewable energy in megacities and rural areas, mid-size cities—generally defined as settlements with populations between one hundred thousand to five hundred thousand residents—occupy a significant but unsatisfactorily unpacked space within the global transitionaway from fossil fuels. As a group these cities comprise an important fraction of the global urban population and are also heavily carbon intensive, thus pathways towards adoption in them have consequences for both national and international climate mitigation goals. The literature shows that mid-sized cities have distinct characteristics which can also define renewable energy pathways as compared to larger metropolitan areas. This argument is supported by Bulkeley and Betsill (2013), who find that smaller urban areas often exhibit higher levels of administrative capacity, institutional variety as well as community cohesion, facilitating more rapid policy experimentation. In particular, theorists like Hoppe et. al., (2015) highlight that underlying barriers still remain, including limited capital availability and experience of setting up economies with a technical expertise gap as well reduced approaching special markets for any renewable energy. This duality — an opportunity and a limitation at the same time — has triggered research into what drives successful low-carbon transitions in mid-sized cities. Grounded theory approaches advancing earlier research on the new commons of renewable energy have highlighted multi-level governance as a major influence guiding local adoption. Even mid-size cities often rely on national frameworks to support climate policies, and regional cooperation is by far the most common strategy, studies of Kern and Rogge(2018) have shown. At the same time, research on community energy projects (Seyfang et al., 2014) suggests that local social capital and civic participation exert differential leverage in smaller-Small cities/region contexts where initiatives by grassroots movements may have more immediate pathways for influencing municipal decision-making. However, gaps still remain in the literature. The majority of prior research consists of case studies from Western Europe and North America, raising questions about what can be transferred to mid-sized cities in the Global South? In addition, few comparative analyses across different geographic and economic contexts limit the ability to build generalizable frameworks for how these products are adopted. This report synthesizes existing research on renewable energy transition in mid-size cities with respect to technological, political, economic and social dimensions. It seeks to clarify what distinguishes mid-sized cities as potential contributors towards the global energy transition and identify productive lines for future research by identifying shared drivers, persistent barriers and emerging best practices.

Literature Review: The Adoption of Renewable Energy in Mid-Sized Cities Most notably, the shift to renewable energy making it one of the most urgent imperatives of our time in the twenty-first century due to increasing concerns about climate change, energy security and sustainable cities. A significant volume of scholarly research has examined renewable energy deployment in the context of megacities and rural settings, but mid-sized cities — those typically defined as urban settlements comprising between 100,000 and 500,000 residents — occupy a crucial yet insufficiently explored place in the global transition to sustainable energy. Together, these cities host billions of the global urban population and are major centres for energy use, meaning that their pathways to full understanding can lead success in national and international climate ambitions. Research shows that mid-tier cities have distinct challenges and opportunities when it comes to their renewable energy development relative to larger metropolitan areas. Bulkeley and Betsill (2013) note that smaller urban centers can be much more nimble administratively, with tighter-knit communities making for a better environment to experiment with policy. In contrast, be it scholars like Hoppe et al. This is corroborated by studies from Mazzucato et al. (2015), which indicate that barriers persist, specifically limited economic resources, gaps in technical expertise or experience and limited accessibility to more sophisticated renewable energy markets This duality — opportunity and constraint taken together — has ignited a push in the research focused on uncovering what, if any conditions of success those mid-sized cities have when it comes to transitioning into renewable energy systems. Newer scholarship has pointed to the importance of multi-level governance in local adoption of renewable energy. Research by Kern & Rogge (2018) show that mid-sized cities often rely on favourable national frameworks and regional collaborations to address their capacity constraints. At the same time, studies of community energy projects (Seyfang et al., 2014) find that local social capital and other forms of civic engagement loom larger in smaller urban contexts where bottom-up initiatives can more easily penetrate municipal processes. Although these works have made important contributions there are still significant gaps in the literature. Most of the research on this topic is based on case studies from Western Europe and North America, thus questioning its transferability to mid-sized cities in the Global South. More importantly, few comparative studies are available across different geographic and economic contexts, which limits the ability to develop generalizable models of adoption. It offers a review of recent literature on patterns of renewable energy adoption in mid-sized cities by synthesising technological, political, economic and social perspectives. It seeks to clarify the specific roles of mid-sized cities within the global energy transition and highlight both persistent barriers and promising pathways for research by identifying common drivers, strategies, and emerging best practices.

# Literature Review: Renewable Energy Adoption in Mid-Sized Cities With an increasingly clear focus on the importance of shifting to renewable sources of energy in the twenty-first century, the adoption process in both rural and urban areas has received a lot of scholarly attention in recent years. However, the particular challenge of transitioning to renewables in mid-sized cities has remained underexplored until now. Defined as areas with populations of 100,000 to 500,000 people, these urban areas contain a relatively large share of urban residents and therefore hold significant potential for contributing to a greener future in their own right. Several researchers have pointed out the fact that mid-sized cities are characterized by unique traits that differentiate them from other types of cities in terms of renewable energy adoption processes. Specifically, according to Bulkeley and Betsill (2013), smaller cities tend to exhibit higher degrees of adaptability and cohesion, making them particularly suited to quick changes. At the same time, Hoppe et al. (2015) have shown that the same type of cities can face certain difficulties in adopting renewables owing to lack of funding and technical skills. The apparent paradox has resulted in the emergence of multiple studies investigating the adoption dynamics of mid-sized cities. Current research shows that the phenomenon of renewable energy adoption by mid-sized cities is heavily influenced by factors pertaining to different levels of government. In particular, scholars (e.g. Kern and Rogge, 2018) find that smaller cities benefit greatly from cooperation with national governments and other cities. Additionally, research into community energy projects indicates that in smaller urban areas social capital is particularly important for successful transitions (Seyfang et al., 2014). Although significant progress has been achieved in this domain already, a number of shortcomings still remain evident in the literature. Firstly, much of the available research is based on the data obtained through studying only Western European and North American cities. Secondly, comparative analyses of energy adoption across geographically diverse and economically unequal countries and regions remain largely scarce. This literature review aims to analyze the existing literature on the topic of renewable energy adoption in mid-sized cities. It will be focused on technological, political, economic, and social factors driving the process in question.

Switching to renewable energy isn’t just a buzzword—it’s become essential. With the threat of climate change getting more severe, cities can’t keep putting it off. Most studies focus on giant cities or remote rural areas, but there’s a whole group in the middle that often gets overlooked: mid-sized cities, those with around 100,000 to 500,000 people. Together, these cities hold a big chunk of the world’s urban population. They use a lot of energy, too, so what they do really matters if countries want to hit those climate targets. Researchers note that mid-sized cities face their own set of challenges and advantages when it comes to adopting renewables. Bulkeley and Betsill, for example, say that smaller cities can actually act faster—they’ve got less red tape and tighter communities, so trying out new policies isn’t as hard. But there are downsides. Hoppe and his team point out that these cities often struggle with smaller budgets, not enough technical know-how, and less access to the specialized markets needed for renewable projects. So, while there’s potential for progress, hurdles can be tough to clear. That contrast is exactly what’s drawn more attention lately—what helps mid-sized cities succeed, and what holds them back? There’s another angle to this: governing structures. Kern and Rogge show that these cities often rely on help from national policies or regional partners because they just don’t have the muscle to do it all on their own. Meanwhile, studies on community energy (Seyfang and others) reveal that local involvement matters even more in these smaller places. Grassroots groups, when they get going, can really steer what the city decides to do on renewables. Still, the research has holes. Most of what we know comes from Western Europe and North America. We don’t know nearly enough about how mid-sized cities in the Global South are coping, so it’s risky to assume that what works in one place will work everywhere. There aren’t a lot of broad, cross-country comparisons out there, so coming up with general rules for success is tough. This review pulls together what’s out there on renewable energy in mid-sized cities. It takes a look at the tech, the politics, the economics, and the social side of things. The goal isn’t just to find out what works and what doesn’t—it’s to get a clearer picture of how these cities can push the energy transition forward, and where we need more research to fill in the gaps.

# Literature Review: Renewable Energy Adoption in Mid-Sized Cities The shift to renewable energy is one of the most urgent needs of the twenty-first century. It is fueled by rising worries about climate change, energy security, and sustainable urban development. While much research focuses on renewable energy use in large cities and rural areas, mid-sized cities—those with populations between 100,000 and 500,000—play a vital yet underexplored role in the global energy transition. These cities hold a considerable share of the world’s urban population and are important centers of energy use. Their paths to adoption are crucial for meeting national and international climate goals. The existing literature shows that mid-sized cities have unique traits that set their renewable energy journeys apart from those of bigger cities. Bulkeley and Betsill (2013) suggest that smaller urban areas often show more administrative flexibility and community unity, which allows for quicker policy testing. On the other hand, scholars like Hoppe et al. (2015) highlight ongoing challenges, such as limited financial resources, gaps in technical expertise, and reduced access to special renewable energy markets. This mix of opportunity and limitation has led to more research on the specific conditions that help mid-sized cities transition to renewable energy systems. Recent studies have highlighted the role of multi-level governance in local renewable energy adoption. Research by Kern and Rogge (2018) shows that mid-sized cities often rely on supportive national policies and regional partnerships to address their capacity issues. At the same time, studies on community energy initiatives (Seyfang et al., 2014) indicate that local social networks and civic engagement have a significant impact in smaller cities, where grassroots movements can more easily sway municipal decisions. Despite these insights, there are still important gaps in the literature. Much of the existing research comes from case studies in Western Europe and North America, raising questions about whether those findings apply to mid-sized cities in the Global South. Additionally, there is a lack of comparative studies across different geographic and economic settings, which limits the creation of broad frameworks for understanding adoption trends. This review brings together current research on renewable energy adoption in mid-sized cities, looking at technological, political, economic, and social factors. By identifying common drivers, ongoing challenges, and emerging best practices, it seeks to clarify how mid-sized cities can contribute to the global energy transition and point out promising areas for future research.