Using Figure 12.3,which of the following statements is accurate regarding the concentration of Earth's atmospheric carbon dioxide through time?

Question

Quizplus · Accepted Answer

According to Figure 12.3, the concentration of atmospheric carbon dioxide increased from approximately 280 ppm (parts per million) in 1800 to over 400 ppm in 2000, which is an increase greater than 100 ppm over the last 200 years. Thus, only option C is accurate. Option A is incorrect because doubling of the Earth's carbon dioxide levels took place over a longer period (more than 200 years) than specified in the option. Option B is also incorrect because carbon dioxide levels on Earth did not double over the last 10,000 years.