Thanks for the ping. Nature is an excellent peer-reviewed publication. The following is from the summary of the article that you provided the link for:
“However, the fraction of these freshly nucleated particles that grow to sufficient sizes to seed cloud droplets, as well as the role of organic vapours in the nucleation and growth processes, remain open questions experimentally. “
The last 4 words are the scientific equivalence of CYA. No proof yet, but a good attempt to model the system in the laboratory.
Science is an endless attempt to prove oneself wrong. Failing to do so we request our peers to prove us wrong. After considerable testing of suggested cause and effect, we begrudgingly admit that we COULD be correct in our speculation.
Ah, if only politics was that way - - - -, sigh.
I simply don't need all that analysis to interpret that the climate variances are related to Sunspot Minimums and Maximums. That has been show empirically over the past 200 years.
Cause? It is the Sun Stupid, not Man.