This document provides an overview of old-growth forests, including:
1) Old-growth forests are ecosystems with old trees over 150 years old that provide important biodiversity.
2) Policies like the Wilderness Act, National Forest Management Act, and Forest and Rangeland Renewable Resources Planning Act aim to protect old-growth forests, especially on federal land.
3) However, logging continues to threaten old-growth forests, especially in the Pacific Northwest, as the timber industry lobbies for more harvesting and some management agencies may not strictly enforce protection policies.