The Earth has been hotter and much colder than it is now so some natural process was likely to be a cause.
Climate models have always been know to be flawed, for example they failed at back predicting known historic climates, so this will help remove some of the pointless speculation based upon obviously flawed climate models.
CERN's 8,000 scientists have made an important contribution to climate physics, prompting climate models to be revised.
Svensmark, who is no longer involved with the CERN experiment, says he believes the solar-cosmic ray factor is just one of four factors in climate. The other three are: volcanoes, a "regime shift" that took place in 1977, and residual anthropogenic components.
When Dr Kirkby first described the theory in 1998, he suggested cosmic rays "will probably be able to account for somewhere between a half and the whole of the increase in the Earth's temperature that we have seen in the last century."