Greenpeace activists unfurl banner reading "Drop Dirty Palm Oil Now" at Wilmar International refinery tanker in Bitung, North Sulawesi.Twenty-three Greenpeace activists and four Boomerang Rock Band members have blocked a palm oil refinery belonging to the world’s largest palm oil trader, Wilmar International. PT Multi Nabati Sulawesi, the refinery, on the Indonesian island of Sulawesi, processes palm oil from producer groups destroying rainforest in Papua and Papua New Guinea.