Across
- 4. Clean sources of energy that do not run out.
- 6. Layer of the atmosphere that absorbs solar radiation.
- 9. Fuels formed from animals that died millions of years ago.
- 10. Throwing dangerous materials in the environment.
Down
- 1. The continuous increase of the earth's temperature
- 2. Taking care of the environment and wild animals
- 3. Rain that became dangerous and acidic because of contamination.
- 5. Garbage
- 7. Damage to the ground that happens over time.
- 8. Cutting hundreds of trees without worrying about the environment.