And what about Sweep? Or maybe it's just a matter for Sue?

I noticed this more because of the reference to deforestation, which I have always felt to be a woefully unaddressed priority: Soot almost as bad as CO2 for global warming

What surprises me is that there still seems so much that is , forgive the bad pun, 'up in the air' about the causes.

Solutions, sadly, even further behind. Though a thread poster called Michael C has had a decent stab.