Contrail is a contraction for condensation trail and is nothing more than the water vapor in a plane's exhaust condensing in the upper atmosphere.
(Contrail; is; a contraction for condensation trail) (Contrail; is; nothing more than the water vapor in a plane's exhaust) (a plane's exhaust; condensing; L:in the upper atmosphere)
Contrail Contrail a plane's exhaust
is is condensing
a contraction for condensation trail
nothing more than the water vapor in a plane's exhaust
L:in the upper atmosphere