It's not a matter of belief or not..it's fact
https:// www.homepages.ed.ac.uk/shs/Climatechange/Stratospherics/Hulme%20stratopsheric%20aerosol.pdf
https://www.researchgate.net/profile/David_Keith/publication/253465544_Efficient_formation_of_stratospheric_aerosol_for_climate_engineering_by_emission_of_condensible_vapor_from_aircraft/links/549233b00cf2484a3f3e0ae0/Efficient-formation-of-stratospheric-aerosol-for-climate-engineering-by-emission-of-condensible-vapor-from-aircraft.pdf
https:// link.springer.com/content/pdf/10.1007/s10584-006-9101-y.pdf