Cosmic rays cause cloud formation. Clouds under certain circumstances are a positive feedback, under other conditions are a negative feedback, however, both models and observations show the positive feedbacks override the negative feedbacks. This research does nothing to change that, it only gives an additional source of clouds. This may mean the models develop too few clouds but the ratio of positive to negative feedbacks is not changed.

So where does this show cosmic rays are causing warming? Where is the physical evidence that variation in cosmic rays leads to variation in global temps?