What can you conclude from this figure?
A. Natural fluctuation of ozone levels varies greatly year to year, so the average for this 50-year span was approximately 330 Dobson units.
B. Switzerland can be used as a model example of how to maintain safe ozone levels.
C. All small European countries will show fluctuations in ozone concentration levels.
D. Ozone levels show a distinct pattern of increasing by 10 Dobson units every 10 years.
Answer:A
What can you conclude from this figure?
A. Natural fluctuation of ozone levels varies greatly year to year, so the average for this 50-year span was approximately 330 Dobson units. B. Switzerland can be used as a model example of how to maintain safe ozone levels. C. All small European countries will show fluctuations in ozone concentration levels. D. Ozone levels show a distinct pattern of increasing by 10 Dobson units every 10 years.