Author Question: The atmospheric content of ________ has been increasing for the last century. What will be an ... (Read 71 times)

DelorasTo

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The atmospheric content of ________ has been increasing for the last century.
 
  What will be an ideal response?

Question 2

________ is (are) responsible for placing oxygen in the atmosphere.
 
  What will be an ideal response?


mcinincha279

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Answer to Question 1

Answer: carbon dioxide

Answer to Question 2

Answer: Photosynthetic plants



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