It seems like many of these approaches would negatively impact power production from solar panels. If you assume that people won’t dramatically lower their power usage (which may certainly be a false assumption) then you effectively make people who use solar power more reliant on fossil fuels.

It would also be interesting if the article included a cost comparison for this sort of wide-scale heretofore untested geo-engineering against just building more renewable/low-carbon power generation; the latter is fairly proven tech at this point.