This document discusses the sustainability of surfing in the 21st century. It provides background on the history and definitions of sustainability, beginning with publications in the 1960s-70s that raised awareness of environmental issues. It then examines how sustainability concepts have been applied specifically to surfing culture, businesses like Quiksilver, and surf tourism. The sustainable surfing movement aims to protect oceans and communities from issues like pollution and overdevelopment. While surfing businesses face challenges becoming fully sustainable, concepts like sustainable surf tourism in developing countries can boost local economies in an environmentally-friendly way. Overall, surfing culture and industries are progressing towards more sustainable practices and awareness of their environmental impacts.