Dear friends:

       I am a polar bear living near the North Pole, Pen. I have one thing to tell you. I couldn’t find my mother and my friends. Have you ever seen them? My home and my playground became smaller and smaller. We couldn’t find food and I am hungry. Do you know why? My father told me that was caused by human’s destruction for environment. People burn fuels such as oil, gas, and coal. It caused the huge amounts of carbon dioxide leading to global warming. I am afraid that my home may be melt one day. I only have one home. Please don’t make it disappear.

                                          Your friend,

                                          Pen