Tree Houses Trees don't just stand around. They do many jobs that are very important to animals, people, and the environment.
Some animals spend their entire lives in trees.
Birds, squirrels, opossums, raccoons, and insects find shelter from the weather and enemies in trees. They get their food from trees, too. Even dead trees provide shelter and food for insects. What Trees Do for You Many people live in wooden houses. Many products in our houses are made from wood.