Energy resources is a fundamental concept within environmental, economic, and engineering sciences, referring to the naturally occurring or artificially produced stores of energy available for human utilization. It encompasses the diverse sources from which energy can be derived and converted into usable forms. As a research field, it investigates the identification, assessment, development, and sustainable management of these sources, including their formation, distribution, extraction methods, conversion technologies, environmental impacts, economic feasibility, and policy implications. Key characteristics studied include resource type (e.g., fossil, nuclear, renewable), availability (finite or replenishable), energy density, and the technological complexity required for extraction and conversion. The significance of this concept lies in its critical role in understanding and addressing global energy security, sustainable development, and climate change challenges.