The blue vertical lines are temperature extremes by year, in the US, since 1895.
The red line is the average temperature by year, in the US.
The black dots are atmospheric CO2 concentrations since 1895.
It's been hot. It's been cold. It's been mild, in between.
Question 1: what's the trend? (please explain why you picked the starting point that you picked)
Question 2: does it look to you that CO2 levels are driving temperature up?
Question 3: does it look to you that CO2 levels are creating more temperature extremes?