On the graph, what’s the relationship between the concentration of atmospheric CO2 and time?
As years move closer to the present time, the percentage of atmospheric
CO₂ remains constant.
As years move closer to the present time, the percentage of atmospheric
CO₂ increases.
There's no visible correlation between the progression of years and the percentage of atmospheric CO2.
As years move closer to the present time, the percentage of atmospheric
CO2 decreases.
