“The Big Sea” is one of the surf culture’s films of the year. It’s won awards, most recently at the Noosa Film Festival, for its harrowing portrayal of the toll taken on a Black community in Louisiana, USA, by a nearby petrochemical factory that makes the base ingredient for neoprene. “Cancer Alley”, it’s called. The implication that surfing is somehow connected to Cancer Alley is clear: according to film-makers Chris Nelson and Lewis Arnold, this is “surfing’s dirty little secret.” But when we watched the film, we were surprised to find no direct, on-the-record link being made between the Louisiana nightmare and any surf wetsuit maker. Did anyone make you a wetsuit from the stuff that’s killing people in Cancer Alley? What actually happened here? Chris volunteered to explain some of the facts behind the film.