Every so often on HN we get a bunch of nutjobs spouting off about geo-engineering, and often specifically about stratospheric aerosol injection (SAI). That is p

Every so often on HN we get a bunch of nutjobs spouting off about geo-engineering, and often specifically about stratospheric aerosol injection (SAI). That is pumping out kilotons of sulphuric acid spray in the upper atmosphere to reduce solar radiation. It's always touted by very clever scientists, usually from somewhere like MIT or elsewhere. It's absolutely poppycock, and dangerous at that. This article takes the whole thing to an absurd level. The idea that you can inject aerosols as a 'subscale deployment' and get meaningful results which would apply on a global scale is so crazy it beggars belief. It's like taking a can of spray paint, painting a single tree in the Amazon and then writing a report outlining the effects it will have on the whole rainforest. Wow, there's no end to this stuff. Just when we thought the carbon capture and carbon credit people had been put out to pasture....