> I know some people are uncomfortable with placing a monetary value on nature. But it's a useful exercise because it forces us to be explicit about what we consider important rather than discussing vague platitudes.

Read this article for insight into what's wrong with exactly that approach: https://www.ribbonfarm.com/2010/07/26/a-big-little-idea-call...

More broadly, the problem with trying to be explicit about what we value is that any specification will almost always be broken, due to the "fragility" of value: https://www.lesswrong.com/posts/GNnHHmm8EzePmKzPk/value-is-f...