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Question 1
For each 5-year increment, beginning in 1990, what change has occurred in carbon dioxide concentrations?
Answer:Peak concentration for each time period is as follows: 357 ppm in 1990, 363 ppm in 1995, 371ppm in 2000, 372 ppm in 2005, 392 ppm in 2010, and 401 ppm in 2015. Carbon dioxide concentrations have risen by between 6 and 11 ppm within these 5-year time periods.
Go to question 2.
Go to question 2.
Question 2
How can this quantitative information be expressed qualitatively?
Answer:Peak carbon dioxide concentrations have risen steadily over the past decade and a half, though there has been some variation in the amount of the increase.