“Old-growth forests met no needs. They simply were, in a way that bore no questions about purpose or value. They could not be created by men. They could not even be understood by men. They had too many parts that were interconnected in too many ways. Change one part and everything else would change, but in ways that were unpredictable and often inexplicable. This unpredictability removed such forests from the realm of human perspectives and values. The forest did not need to justify or explain itself. It existed outside of instrumental human considerations.”