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Ninth Grade (Grade 9) Biogeochemical Cycles Questions

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Grade 9 Biogeochemical Cycles
Which gas is not considered a greenhouse gas?
  1. carbon dioxide
  2. methane
  3. oxygen
  4. water vapor
Grade 9 Biogeochemical Cycles
Which gas is not an anthropogenic global warming gas?
  1. carbon dioxide
  2. halocarbon
  3. hydrogen
  4. methane
  5. ozone
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