Essentially the climate system is a very complex, there is one part of anthropogenic forcing. It is a very, very weaker, much weaker than what the IPCC claims, at least half,” Scafetta claimed in his talk There is some volcano activity, so there is, some internal variability, but essentially there is also a dynamic component, a harmonic component which is regulated by astronomical forcing. And so this forcing is driven by the movement of the planets around the sun that creates some set of stable resonance that will synchronize the solar and climate activity.