1. I can enthusiastically recommend Dr. Kimberly Prather's lecture on aerosols and climate.
I'm watching it now.
I'm not sure how many people are actually interested in the physical chemistry of climate change, but the lecture in this series on their effect on rainfall - the type and chemistry of the particles has a profound effect on whether they cause rain or not - is most illuminating.
People who put their hope in geoengineering approaches to climate change - I'm certainly not one of them - would do well to watch this lecture, particularly to realize how little we actually know about the relationship of aerosol particles and the formation (and most importantly the functional behavior) of clouds.
I certainly plan to pick up some of Dr. Prather's papers in the next few weeks.