Their are people that believe that the contrails left by aircraft are some government conspiracy but this is not the case. They are simply water vapor trails. They are triggered by the water vapor in the exhaust of aircraft engines or changes in air pressure over the wings surface.
Contrails or condensation trails
Yes, any aircraft makes vapour trails in the right conditions.
Condensation in the low temperature atmosphere of vapours found in the engine exhausts. Its name is a Contrail - condensation trails.
If you're referring to the smoke coming off the wing tips of aircraft that would be a wing tip vortex which is what occurs from the induced drag created by the wings of the aircraft as it creates lift. the smoke that comes from the exhausts of the jet turbines is not actually smoke but water vapor called con trails. the higher temperature water vapor from the exhaust mixes with the cooler temperature air outside of the exhaust and causes the water to condense making the con trails as the aircraft travels through the air.
Why did Cester leave the tv show gun smoke
Yes it looks like a black sharpie drew on it
You leave behind DNA evidence in the form of skin cells, hair follicles, saliva, and sweat. These contain your unique genetic code, which can be used for identification purposes in forensic investigations.
Smoke trail is the trail of smoke left behind by an aircraft as it flies in the sky.
Smoke rockets launched just before the detonation of a test device to help measure the blast wave.
during and explosive eruption hot ash is thrown in the air. Leaving trails of smoke.
If you are asking about contrails it is dependent on the temperatures aloft. At colder temperatures the water vapor in the exhaust condenses and causes the contrails you see. The blue angels and other aerobatic-performance aircraft inject a special oil "smoke oil" into their exhaust in order to leave the smoke trail you see at airshows. But the "smoke trail" you see behind civilian and commercial aircraft isn't smoke at all, it is water vapor formed as described above.