Nitrogen? That's basically just air, what good would a balloon be using nitrogen? Might as well just blow it up with your lungs. It's certainly not going to float in any case.
reply> balloon use ... helium became much, much more expensive
replyMore than just from inflation? (sorry, not sorry!)
Is lifting gas? That’s pretty cool.
replyTechnically yes, but practically no. Air is 78% nitrogen. Nitrogen is 3.3% lighter than air. Helium is 86.2% lighter than air. Hydrogen is 93% lighter than air.
replyNo.
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