By Tobias Carroll Thinking about land and preservation in certain ways can make one’s head spin. A new article in The Atlantic by Cathleen O’Grady explores the phenomenon of “green lairds” in Scotland — and a very particular subset of that. The short version: across Scotland, there is a growing number of very wealthy people for whom preserving land has taken on a competitive aspect. Choose your form of prestige: you could buy a bepoke sports car or you could preserve hundreds or even thousands of acres. The latter seems like an eminently understandable option — but, as O’Grady’s article points…