Earth Day

2. A layer in the Earth atmosphere
5. a sudden violent movement of the earth's surface, sometimes causing great damage
10. A trash on the ground
12. a popular colour on the Earth day
13. a large amount of ice, snow, and rock falling quickly down the side of a mountain
15. a long period when there is little or no rain
16. When you reduce, reuse and recycle, you are ................... friendly.

1. global warming causes melting of....
3. Su energy
4. A process of cutting down trees
6. An area where animals live
7. A flying mammal
8. It's all around us, we breathe it and we should be careful not to pollute it.
9. to use less
11. An animal that has a trunk
14. The study of relationships between plants and animals and their surroundings