text: So does Figure 1 falsify the CO2 hypothesis? Not yet, weve got a ways to go, but it is an interesting finding. First, we need to look at the two explanations postulated by the good folks at the IPCC that I quoted at the head of the postvolcanoes and solar variations. And the amount that we are looking to explain is a missing increase of 1.6 W/m2 per decade.