Once upon a time, Echo the Elephant lives in a happy healthy forest.

One day, Echo noticed the weather was getting hotter.

This is called global warming, Echo learned.

Echo saw cars and factories making lots of smoke.

The smoke made the air dirty and hard to breathe.

Echo's animal friends were having trouble breathing.

Echo saw ice melting in the North and South poles.

Polar bears were struggling to find places to live.

Echo noticed many trees were being cut down.

Trees help clean the air and give us oxygen.