Economically, cod liver oil is less abundant and more expensive than plant oils, often used for pharmaceuticals. However, using waste liver oil from fish processing adds value and offsets disposal costs. Ecologically, marine-sourced biodiesel reduces food crop competition and supports waste reduction in fisheries. Key challenges include feedstock logistics, seasonal availability, and regulations on marine byproducts. The GlobeCore USB system enables flexible, modular production, ideal for coastal regions looking to add renewable fuel streams to existing industries.