Tundra habitats are some of the harshest places on Earth. They exist in the Northern Hemisphere north of the Arctic Circle and on mountains at high altitude. But all the plants and animals that live in tundra habitats are highly adapted to living there. People have lived in tundra habitats for thousands of years. However, human activity threatens the future of these important places. Using short facts and full-color photographs, this book introduces readers to the vast diversity of tundra habitats around the world and the measures we need to take to preserve them.