Multiple Choice
-Examine the historical changes in carbon dioxide levels and global temperatures in these figures.Although carbon dioxide levels have climbed steadily over the past 50 years,global temperatures for the same period have been more erratic,increasing and decreasing,yet climbing overall.Which is the most reasonable hypothesis explaining why global temperatures are more erratic than carbon dioxide levels?
A) Carbon dioxide accumulates in the atmosphere while many factors affect global temperatures.
B) Carbon dioxide steadily escapes from the atmosphere into space while global temperatures accumulate irregularly.
C) Carbon dioxide levels are produced at an even rate while clouds may cool the Earth unevenly.
D) Carbon dioxide levels increase temperature until the heat destroys some of the carbon dioxide,lowering temperatures irregularly.
Correct Answer:
Verified
Correct Answer:
Verified
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