#NewsPaper - Oct. 29, 2020 Tongass is the United States’ largest national forest and the world’s largest temperate rainforest. At almost 17 million acres, Tongass National Forest could cover Massachusetts, New Hampshire and Connecticut. Its vast landscape of centuries-old cedar, hemlock and Sitka spruce trees absorbs a significant amount of carbon dioxide from the atmosphere, and scientists have long identified Tongass as key habitat for a range of animal species.