Carbon dioxide: A) comprises up to two percent of the ...

[dalyningkenk]

Carbon dioxide:
 
  A) comprises up to two percent of the atmospheric gases.
  B) is being removed from the atmosphere faster than it is being inputted.
  C) is removed from the atmosphere by photosynthesis.
  D) is not present in significant amounts in the atmosphere of Venus.

Question 2

Atmospheric carbon dioxide concentrations: INSERT FIGURE 1-6. NO CAPTION
 
  A) have decreased over the last few decades.
  B) increase with height above the tropopause.
  C) have not been reliably measured for the northern hemisphere.
  D) are highest in early spring.

[leahm14]

Answer to Question 1

Answer: C

Answer to Question 2

Answer: D

[dalyningkenk]

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