Passage III

Greenhouse gases such as methane (CH4) warm Earth's climate. Figure 1 shows the concentration of CH4 in Earth's atmosphere and the solar radiation intensity at Earth's surface for tropical Europe and Asia over the past 250,000 years. As the figure shows, the CH4 concentration and the solar radiation intensity have increased and decreased at the same times over most of this period. Figure 2 shows the same types of data for the same region over the past 11,000 years. This figure is consistent with the hypothesis that the greenhouse gases from human activities may have begun warming Earth's climate thousands of years earlier than once thought.

16. Suppose that whenever the CH4 concentration increases, a corresponding, immediate increase in average global temperature occurs, and that whenever the CH4 concentration decreases, a corresponding, immediate decrease in average global temperature occurs. Based on Figure 2, which of the following graphs best represents a plot of average global temperature over the past 11,000 years?

Answer and Explanation

Your Answer is

Correct Answer is G

Explanation

According to the title, it can be seen that CH4 concentration and temperature are positively correlated.

Looking at figure 2, I found that the CH4 curve in the figure first decreases and then rises, so the temperature in this question should also fall first and then rise