A long sustained belief that undeveloped natural resources constitute unproductive economic waste has recently been losing ground. Moreover, preserving a natural resource such as wetlands is not preserving something unproductive. On the contrary, the resource can often be considered as socially and economically productive in its undeveloped form. In other words, an unaltered natural resource has the potential of being productive in both material and non-material ways. In making a decision about preservation the relevant point is the social productivity of a resource in its preserved condition as compared to its social productivity in an altered condition.