Green Gap: Archival Fashion. Last winter, I got a lucky break in every sense. I was a friend’s plus one on a Caribbean cruise. But for an eco warrior, this comes with more baggage than my Patagonia rucksack can carry. On average, a cruise ship emits more carbon per passenger mile travelled than a short-haul flight. But to paraphrase Katy Perry, I took a cruise, and I liked it, especially the interesting sustainability. The most unexpected?