.... is one of the biggest mammals in the ocean. It has a nose on its head to breathe air in.
whale
Many people throw ...... into water, which causes water pollution.
garbage
Using.... bags is not environmentally friendly. It takes years for the bags to disappear. We should use..... bags to protect our environment.
plastic, paper
When oil tankers sink in the ocean, ...... may happen. They may kill many sea creatures.
oil spills
People in our country often throw garbage on the streets, and factories keep making the air dirty. We must stop or...... will get worse
pollution
