Environmental issues

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