> Loon balloons are helium, and helium gas is famously hard to contain It's not like there are any better options? The only two practical lifting gases are hyd

> Loon balloons are helium, and helium gas is famously hard to contain It's not like there are any better options? The only two practical lifting gases are hydrogen and helium. Hydrogen leaks even more than helium and is flammable, even though it is much cheaper and abundant.