Across
- 2. Animals that are close to became extinct
- 4. pollution of atmosphere
- 7. Put used materials so they can be used again
- 8. dense tropical forest
- 9. chemicals used for killing insects
Down
- 1. rising temperature in the atmosphere
- 3. Power used for producing heat
- 5. protect us from UV radiation
- 6. toxic gases relased by cars
- 9. Body in space that moved around the Sun