Complex sentence: The Appalachian Temperate Rainforest is located in the southern Appalachian Mountains of the eastern U.S. About 351,500 square kilometers (135,000 square miles) of forest land is spread across southwestern Virginia, western North Carolina, northern Georgia, and eastern Tennessee.
Split into simpler sentences: The Appalachian Temperate Rainforest is in the southern Appalachian Mountains of the eastern U.S. It is about 351,500 square kilometers (135,000 square miles). It spreads across southwestern Virginia, western North Carolina, northern Georgia, and eastern Tennessee.