subtitled: They have apps for that! 

(part I is here (café version), (c99% version))

‘Our Climate is Changing Rapidly; It’s Time to Talk about Geoengineering’, futurism.com, Jan. 12, 2018.  The author discusses several high-tech methods afoot, deconstructs most of them as to the dangers of unintended consequences, costs, and what the actual bio-chemical science of some of the ‘solutions’ would wreak. To save quoting extensively, I’ll borrow their graphics, then bring a few lines from a 2017 piece at the Guardian as explanations.