Smoke ring with only air?

[kompabt]

"smoke" ring with only air?

Can "smoke" ring be blown with only air (withouth smoke) in cold?

 

[klimatos]

Can "smoke" ring be blown with only air (withouth smoke) in cold?

Yes. The water vapor in your exhalation will condense into visible "mist". This mist can be formed into a "ring" with the same "popping" procedure that you use to make a ring with tobacco smoke.

Almost everyone who lives in cold climates has tried this--some with more success than others.