Here's why this "natural capital" approach is deeply flawed - unless you're hoping to make a killing from nature. https://www.theguardian.com/commentisfree/2018/may/15/price-natural-world-destruction-natural-capital
Markets change the meaning of the things we discuss, replacing moral obligations with commercial relationships. This corrupts and degrades our intrinsic values and empties public life of moral argument.
First we lose our wildlife and natural wonders. Then we lose our connections with what remains. Then we lose the words that described what we once knew. Then we call it capital and give it a price. This approach is morally wrong, intellectually vacuous and self-defeating.