Long-term data on global carbon dioxide levels can be obtained from analyzing air trapped in

Question

Quizplus · Accepted Answer

Ice cores drilled out of the Antarctic ice sheet provide records of long-term changes in atmospheric carbon dioxide levels. As snow accumulates in Antarctica, air bubbles are trapped within it. Over time, these snow layers are compressed into ice and the air bubbles are locked in. By analyzing the air bubbles in these ice cores, scientists can determine the atmospheric carbon dioxide levels going back hundreds of thousands of years.

Long-Term Data on Global Carbon Dioxide Levels Can Be Obtained