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Author Question: Over the last century and a half, the main source of increased atmospheric carbon dioxide has been ... (Read 66 times)

Capo

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on: Jul 13, 2018
Over the last century and a half, the main source of increased atmospheric carbon dioxide has been ________.
 
  A) volcanoes
  B) photosynthesis
  C) photoperiodism
  D) rock decomposition
  E) burning of fossil fuels

Question 2



braelync

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Reply #1 on: Jul 13, 2018
Answer to Question 1

Answer: E

Answer to Question 2

Answer: D


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