Once upon a time, there was a beaver. He lived near the river and he loved to wear boots. One day, when he opened his front door  black smoke came into his house. When he went outside he saw a big factory. The factory was causing pollution which was destroying the air and the river. The beaver started to rip up his calendar and made picket signs. Then he started to knock on his friend’s doors and gave them the signs. The next day, they started to protest against the factory. Finally, the government ordered the factory to shut down. The beaver became famous for saving the river and the environment.