He says that people will dub golf courses as not particularly biodiverse so as to argue they do not really count as green, and therefore should not be part of the green belt. De Zylva argues this misunderstands the point: "The purpose of the green belt isn't to be green per se, it is to be a buffer to prevent sprawl." So the question is not only whether golf courses are particularly biodiverse, but whether or not it is wise to build on this type of land.