We've discussed this before; they only look like palm trees (we don't have to tell them that, just tell the name in Latin, you know what priests and GPS do,!), They are NZ cabbage plants, (Cordyline australis) The leaves are edible but useless for burning. Life expectancy about 50 years. It's called decline.We should organize a training course there! Do you think people would travel from all around the world to a beautiful island, with beaches, palm trees, dolphins? And kippers.