Lead researcher Professor Alan Robock said that there’s no rain in the stratosphere, so any toxic particles released there will remain in the atmosphere up to 50 times longer than they would have on the surface.

Sulphur Dioxide (SO2) is a severe respiratory irritant that can cause immediate airway constriction and acute exposure to it leads to coughing, wheezing, shortness of breath, & increased airway resistance

https://www.geo.tv/latest/671564-scientists-warn-of-new-risks-linked-to-plan-to-dim-the-sun

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