OT: And in theory a rocket would probably work better at that altitude than a plane. It would be very easy to have re-useable rockets sent up to that altitude and release the chemical cocktail, rather than refitting planes.my personal (outsider) opinion, is if they are going to hijack the term geoengineering, you should stick them to it. and if its inefficient under 60,000 feet for climate change then its inefficient. *
if they are spraying aluminum to sell Monsanto seeds then the planes need to be lower to have any effect.
* its also ridiculous to suggest America would spray for climate change (sun screening) OVER AMERICA. you'd think people would know our reputation by now. we would do it over another country.