The third issue of the World Ocean Review, WOR 3, is devoted to marine resources – metals and energy – and their utilization. It gives the facts about the extraction of known oil and gas deposits below the ocean floor and examines the impacts upon flora and fauna. It explains how gas hydrates form on continental shelves and what potential they hold. The review further explores in detail the opportunities and risks presented and posed by extracting mineral resources from the seabed: manganese nodules, cobalt crusts and massive sulphides