More Contrails Nonsense

For what seems like the thousandth time in my career I must say it again: the white "trails" you see behind a high-flying jet are the product of combustion in the jet engines, not some nefarious "chemical" scheme. 

It is essentially same stuff that comes out of your car's exhaust system.

I am disappointed in the Daily Mail for printing these bogus headlines. 

Thought I would add this cool photo of planes crossing paths. Please note the contrails (smoke) corresponds to each of the engines not some mysterious "chemical spraying" apparatus.