1. Hi, class! Did you know that Earth Day was first celebrated on 22 April 1970? From that day, Earth Day is celebrated all over the world. Are you aware that I AM in DANGER? Think about all the small things you can and should do to save me!! But can you still remember why I am so important to human beings?

2. Air Pollution

3. Water Pollution

4. Deforestation

5. Endangered Species

6. Overpopulation

8. The hole in the Ozone Layer

9. Garbage