Green surfboards? I don't know. It seems to me if it's not made of wood, it ain't green. Let's put it in perspective in terms of the two most popular board making materials: polyurethane and epoxy. Polyurethane foam (AKA PU) is wrapped in fiberglass cloth and slathered in polyester resin.
This combo, while brimming with pure surf energy, is a toxic petroleum-based gumbo incapable of decomposing naturally for a century. Likewise, epoxy surfboards, which have become an industry semi-standard, use lighter foam blanks covered with lighter plastic-like epoxy resin. Both build building processes give off volatile organic compounds (VOCs) and are identified as carcinogenic (epoxy less so).










