>How much biodiversity do we "need"? Clearly a non-zero amount, but not all. And therein lies the subtlety that cannot be handled by internet forums. And proba

>How much biodiversity do we "need"? Clearly a non-zero amount, but not all. And therein lies the subtlety that cannot be handled by internet forums. And probably not by people at all, other than some politically unpalatable way of putting dollar amounts on externalities.