It's home to some of the world's rarest species. But the Galapagos Islands may not be able to survive a modern onslaught. Ecuador, of which the Galapagos is a province, says massive tourism is threatening the islands; the South American nation is now asking Unesco to add the habitat to its endangered list. Graham Watkins is a Galapagos environmentalist. Here's his view on how the islands can be preserved.
