AUTHOR=Ramkumar Alajingi , Marimuthu Ramakrishnan TITLE=The reclassification of energy sources for electrical energy JOURNAL=Frontiers in Energy Research VOLUME=11 YEAR=2023 URL=https://www.frontiersin.org/journals/energy-research/articles/10.3389/fenrg.2023.1150074 DOI=10.3389/fenrg.2023.1150074 ISSN=2296-598X