Humans have polluted the ocean with plastics, chemicals, garbage and oil spills. It's time for us to stop throwing our waste in the ocean. Learn what is being done to clean up the ocean and to protect marine life. Level 3 readers are aimed at children who are reading by themselves and can grasp new concepts. Key words and captions help readers understand new vocabulary and more challenging sentence structure. This project has been made possible in part by the Government of Canada.