[FairfieldLife] Re: San Francisco to be sprayed with pesticide

[sandiego108]

--- In FairfieldLife@yahoogroups.com, Angela Mailander 
<[EMAIL PROTECTED]> wrote:
>
> Yes, I've observed this phenomenon also.  It does
> suggest that the plane is ejecting something that it
> can stop doing while continuing to fly.  So it's not
> just normal jet vapor.  
> 
the jet vapor or contrail is a byproduct of a high compression, high 
bypass engine processing the naturally existing water vapor in the 
atmosphere. The water vapor is highly compressed by the engine and 
released as a contrail made of ice particles. If there is little water 
vapor in the atmosphere, there will not be a contrail.