Carbon Crossword Puzzle 🧬

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Across
  1. 3. Global warming is heavily caused by this atom
  2. 4. There is so much carbon dioxide that ________ and seas can’t keep up
Down
  1. 1. Oil is liquified carbon from _______ animals
  2. 2. Carbon has this many points of attachment
  3. 5. Carbon creates a ________ bond when it connects with itself