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What about helium? Last time I checked, helium was getting way more expensive than before, and it was actually kind of hard to find.
by Florin_Andrei 14y ago
What about helium? Last time I checked, helium was getting way more expensive than before, and it was actually kind of hard to find.
- stilldavid 14y agoHydrogen is a great substitute - it's abundant, cheap, provides a bit more lift and if you're aware of the risks and handle it properly it's quite safe.