2. Considering the data represented by Figure 1, which of the following is the most accurate description of current COz levels?

Question

COz levels are lower than at any point in the last 400,000 years.
CO, levels are the highest in Earth's history.

CO, levels are roughly in line with historical averages.
COz levels are higher than at any point in the last 400,000 years.

Answer 1

Based on Figure 1, the most accurate description of current CO2 levels is that they are higher than at any point in the last 400,000 years.