Compressed helium tanks aren’t permitted on planes in the ... Small helium-inflated balloons, however, are allowed aboard ...

Cracker question because helium balloons are actually a pretty controversial topic. Some people argue that they are harmful to the environment because on returning to Earth, animals mistake them ...

and is used to pressurise rocket fuel tanks. It is also essential in scientific research, including cryogenics and nuclear magnetic resonance spectroscopy. With global demand for helium growing ...