posted on Apr, 13 2005 @ 08:50 PM
To those of you who claim the difference between contrail and chemtrail is that chemtrail lasts longer.
Not necessarily! Contrails can last in the atmosphere very long too. The reason contrails exist in the first place is because of moisture released
from the aircraft due to combustion reaction (AFAIK ALL combustion reactions have CO2 and H2O as products)
Air can dissolve water moisture, but only so much moisture can be dissolved. If air is saturated with moisture, additional moisture pumped into it
will look like clouds, which is essentially what the contrail is.
If air is not saturated, additional moisture pumped into it will slowly disappear (dissolved into air).
The amount of moisture the air can hold depends on the temperature. The colder the temperature, the less moisture that air can dissolve.
So therefore, on a cold day where the amount of moisture in the air is close to the maximum amount that the air AT THAT TEMPERATURE can hold,
contrails can last very long. If the air is actually saturated, contrails will last until the moisture level decreases. Contrails disappear fairly
quickly if it's a warm or very dry day.
I am not denying the possibility of the use of chemtrails though. If on a hot and dry day, you see a trail from a plane that lasts for very long time,
then you should be worried!
[edit on 13-4-2005 by Taishyou]