Climate Change

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Across
  1. 3. The effects making ice melt in Nordic locations.
  2. 5. The shield around our world.
  3. 7. __________ gas.
Down
  1. 1. Less trees, more of this.
  2. 2. A gas all human kind needs to survive.
  3. 4. Our planet?
  4. 6. People get sick from?