Here is an interesting article from the Environmental News Network that bridges many of our topics.
While I tend to agree with most of the article, being a realist I fear that this call for valuation will largely go unheeded. Why? Non-market valuation surveys tend to be expensive. As governments budgets are slashed in the face of the global economic downturn, can they afford to conduct expensive valuation studies? Of course, I'd like to argue that they cannot afford not to.