Over a large area, the motion of the atmosphere is primarily ...

[AEWBW]

Over a large area, the motion of the atmosphere is primarily ________. Why?
 
  (A) vertical
  (B) horizontal
  (C) We do not know.

Question 2

Explain fluctuations in atmospheric carbon dioxide concentration both within the course of a single year and over the last century.
 
  What will be an ideal response?

[courtney_bruh]

Answer to Question 1

Answer: (B)

Answer to Question 2

Answer: It is supplied to the atmosphere by plant and animal respiration, the decay of organic material, volcanic eruptions, and natural and anthropogenic (human-produced) combustion. Carbon dioxide is removed from the atmosphere by photosynthesis, the process by which green plants convert light energy to chemical energy. For many decades, the rate of carbon dioxide input to the atmosphere has exceeded the rate of removal, leading to a global increase in concentration. The increase has occurred mainly because of an increase in anthropogenic combustion and, to a lesser extent, deforestation of large tracts of woodland.

[AEWBW]

Gracias!

[at]

Excellent