The graph that shows the US as the #3 CO2 generator after China (#1), and all of Asia except China & India (#2)? The one that shows the US generating about half as much as China despite having less than a third of the population? The one that shows the US's contribution to be more than the continents of Africa, South America, and Oceania combined?
Struggling to see how one could look at such a chart and think it's futile for the US to take meaningful action.