Across
- 3. rain that dissolves what it lands on
- 4. gas produced when we bur fuel
- 9. gases that keep earth warm
Down
- 1. Harmful layer coming from the sun
- 2. The process plants use to produce food
- 3. layer of air above earth's surface
- 5. growing trees back again
- 6. Layer that protects Earth from harmful radiation coming from the sun
- 7. cutting forests down
- 8. Clean fuel from plants