Air/Land Pollution

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Across
  1. 4. The layer of the atmosphere that protects us from the sun
  2. 6. Sources from nature that are NOT easy and quick to replace
  3. 7. Gases in the air that trap heat and make the Earth warmer
  4. 8. Harmful gases or smoke
Down
  1. 1. The destruction of forests
  2. 2. Sources from nature that are easy and quick to replace
  3. 3. To set on fire
  4. 5. The burning of coal, oil, or gas to create energy