One small problem. The CO2 theory says warming is caused by the CO2, where most of it got into the atmosphere since about 1945. This graph shows the warming happening when there is little added CO2, and growth of temperature halting as CO2 is released. Being essentially flat from 1932 to the left margin. We do see that the last half dozen years again have about 1/2 the low going range pruned out of the data; or it could just be like the 1940s flat period again.