Earth Day Crossword

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Across
  1. 2. The planet you're on (easy)
  2. 5. One of the gasses in the green house and is commonly blamed for global warming (hard)
  3. 6. Non-biodegradable material that is bad for the environment (medium)
  4. 7. Gasses that are in a green house and are bad for the environment (medium)
Down
  1. 1. Creatures that live in the previously mentioned big bodies of water (easy)
  2. 3. Shelled Creatures (easy)
  3. 4. Big bodies of water (easy)