Definitions

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Across
  1. 2. Chlorine and Florine contain compounds
  2. 3. Harmful substances causing pollution
  3. 6. cutting down trees on large scale
  4. 7. objects that don't allow light to pass through them
  5. 8. rain mixes with pollutants
Down
  1. 1. objects allow light to pass through them
  2. 3. chemicals use to destroy pets that harm plants
  3. 4. the soil is washed away by rain or by wind
  4. 5. the objects that are producing their own light