## 3 Bibliometric Analysis
### Evolution of Publications and Research Areas  
Figure 2 illustrates the evolution of publications between 2005 and 2024, based on a bibliographic search that yielded 82 documents (55 articles, 20 conference papers, and 7 reviews) addressing the main topic of this work over the past 19 years. An exponential increase in the publication of articles related to this field has been observed over the last six years, contrasting with earlier years. Specifically, there has been a significant rise in scientific output on these topics since 2018, reaching a peak in 2023 and 2024. This exponential growth reflects the increasing interest in sustainable energy solutions and the importance that this field has gained on the global scientific agenda. Figure 2: Evolution of the Number of Publications Over the Years (2005–2024) in the Field of the Main Objective of This Study. Most Frequently Used Keywords in the Research Field. Articles focusing on these themes, aimed at integrating more renewable energy and mitigating the effects of climate change on electricity generation, were classified into the top 10 publication areas, along with affiliations, countries, journals, and authors, as shown in Table 1. The main research areas were climate change (29.27%), solar energy (26.83%), and renewable energies (25.61%), with the research line on drought (19.51%) also standing out as a key term closely related to the topic. \begin{table}
\begin{tabular}{l l l} \hline _Classification_ & _Lines of Research_ & _Number_ & \% * \\ \hline
1 & Climate change & 24 & 29.27 \\
2 & Solar energy & 22 & 26.83 \\
3 & Renewable energies & 21 & 25.61 \\
4 & Wind power & 18 & 21.95 \\
5 & Drought & 16 & 19.51 \\
6 & Hydroelectric power & 16 & 19.51 \\
7 & Renewable energy resources & 15 & 18.29 \\
8 & Alternative energy & 14 & 17.07 \\
9 & Solar power generation & 14 & 17.07 \\
10 & Fossil fuels & 12 & 14.63 \\ \hline _Classification_ & _Affiliations (Country)_ & _Number_ & \% * \\ \hline
1 & Stanford University (United States of & 8 & 9.76 \\  & America) & & \\
2 & Nanjing Forestry University (China) & 7 & 8.54 \\
3 & Beijing Jiaotong University (China) & 6 & 7.32 \\
4 & Nueva Ecija University of Science and & 6 & 7.32 \\  & Technology (Philippines) & 6 & 7.32 \\
5 & University of Cape Town (South Africa) & 6 & 7.32 \\
6 & University of Exeter (England) & 6 & 7.32 \\
7 & Dalian University of Technology (China) & 5 & 6.10 \\
8 & Hong Kong University of Science and & 5 & 6.10 \\  & Technology (Hong Kong) & 5 & 6.10 \\
9 & Universiti Teknology Malaysia (Malaysia) & 5 & 6.10 \\
10 & University Tenaga Nasional (Malaysia) & 5 & 6.10 \\ \hline _Classification_ & _Country_ & _Number_ & \% * \\ \hline
1 & China & 60 & 73.17 \\
2 & United States of America & 40 & 48.78 \\
3 & India & 19 & 23.17 \\
4 & Italy & 17 & 20.73 \\
5 & Brazil & 13 & 15.85 \\
6 & Malaysia & 12 & 14.63 \\
7 & Spain & 12 & 14.63 \\
8 & Philippines & 10 & 12.20 \\
9 & Portugal & 9 & 10.98 \\
10 & Germany & 8 & 9.76 \\ \hline _Classification_ & _Journals_ & _Number_ & \% * \\ \hline
1 & Energy & 6 & 7.32 \\
2 & Applied energy & 3 & 3.66 \\
3 & Environmental science and pollution research & 3 & 3.66 \\
4 & International journal of hydrogen energy & 3 & 3.66 \\
5 & Journal of Cleaner Production & 3 & 3.66 \\
6 & Case studies in chemical and environmental & 2 & 2.44 \\  & engineering & 2 & 2.44 \\
7 & Desalination & 2 & 2.44 \\
8 & Energies & 2 & 2.44 \\
9 & Energy conversion and management & 2 & 2.44 \\
10 & Renewable energy & 2 & 2.44 \\ \hline \end{tabular}
\end{table} 
Table 1: Top 10 publishing areas ranking. Affiliations, countries, and journals based on the number of publications. The evolution of research in renewable energy and climate change reflects the growing need for optimized technologies to address energy and environmental challenges. This increasing focus underscores the importance of policies and investments that drive innovation in sustainable energy solutions.