According to the source, "Current man-made and natural ISA emissions total over 100,000 tonnes and have many beneficial climate effects". They are not advocati

According to the source, "Current man-made and natural ISA emissions total over 100,000 tonnes and have many beneficial climate effects". They are not advocating for doing anything particularly new, just scaling up those (partially natural) emissions by a factor of 2. Of course, that doesn't necessarily mean it's a good idea. Forest fires are natural, but we would need to study very carefully before we attempted to double the amount of forest fires by artificial means. In my opinion, though, it would take some pretty strong evidence that this would be actively harmful to dissuade me from wanting to run large scale experiments. Shoot, if leaded gasoline had the potential to slow down climate change it might even be worth bringing it back, considering the damage that climate change has already begun to cause and is projected to cause.