Extinct but not forgotten Staff Member
While there isn't enough aerosol load in an aircraft to produce a trail made up of simply the payload, there is nothing preventing the supersaturated atmosphere from using the nuclei from the exhaust and/or aerosol theoretical payload from triggering a persistent contrail . . . so a Chemtrail of some small parts per million concentration is still quite possible . . .A simple "How much does a contrail weigh per mile" might be a good way of phrasing it. How much does a cloud weigh?
"Persistent trails can't be chemtrails - do the math!"