Refers to the optimal methods and advancements for handling organic waste in a sustainable and green way, emphasizing "Green-to-X" transformations. The main applications are Anaerobic Digestion, Composting, Hydrothermal Gasification, Black Soldier Fly Larvae Farming, and Biorefineries. Overall, "Best technologies and solutions for Organic Waste Management: Green-to-X" encapsulates the pursuit of effective, sustainable, and innovative methods for converting organic waste into valuable resources, contributing to a greener and more circular future.