Educate yourself with a little basic science in this short video

Stop the condescension. I understand how humidity works. My retort still stands with car exhaust. The same "scientific" principles should work both with cars and planes, yes? Or is there a different "science" for each? Must be a different humidity for planes?

Riddle me this, Mr Science:

How is it, on the same day - and at the same time - one can see two similar planes flying at roughly the same altitude, one plane leaves a long, never dissipating trail, while the other plane leaves a trail that disappears almost immediately?

Educate yourself with a little basic science in this short video

Stop the condescension. I understand how humidity works. My retort still stands with car exhaust. The same "scientific" principles should work both with cars and planes, yes? Or is there a different "science" for each? Must be a different humidity for planes?

Explain this Mr Science:

How is it, on the same day - and at the same time - one can see two similar planes flying at roughly the same altitude, one plane leaves a long, never dissipating trail, while the other plane leaves a trail that disappears almost immediately?