Carbon Cycle

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Across
  1. 3. natural process that keeps the planets temperature at a level that life can exist
  2. 5. the process of taking CO2 out of the air
  3. 6. increase in the planets temperature
Down
  1. 1. non-renewable sources formed in the past from remains of living things
  2. 2. CO2, CFCs, N2O, H2O vapor, CH4, O3
  3. 4. areas that absorb and store CO2