Some of the work at CERN seemed to say that cosmic
rays nucleate very small droplets that do not increase to cloud size... Anyway, some of us follow GCR for reason of climate amplifications and even Ozone hole development.
And this is why CERN is necessary - because it carries a bit more weight in scientific matters - and they are working to understand the unknown mechanisms of how 10 micron particles
nucleate from smaller particles (and
nucleate from smaller particles they obviously do, how much cosmic
rays affect that is unknown).