In the face of accelerating environmental challenges, global climate change, and the urgent need for sustainable development, the integration of energy, ecology, and environmental sciences has become more crucial than ever before. The interconnectedness of these domains forms the bedrock of holistic approaches to resource management, conservation efforts, and the development of sustainable technologies. This edited volume, Energy, Ecology, and Environment: Fundamentals and Applications, has been compiled to explore and analyze these linkages across a wide range of contexts, from ecosystems to urban landscapes, and from renewable innovations to policy frameworks. The book brings together 16 thematically diverse yet conceptually interrelated chapters, written by researchers and experts in their respective fields. Beginning with foundational concepts, the volume delves into the dynamics of energy transfer in ecosystems and the critical role of biodiversity in maintaining energy flow and ecological balance. The work further examines renewable and non-renewable energy resources, shedding light on their environmental implications and the importance of transitioning towards more sustainable energy paradigms.