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Key Facts In This Video
Helium doesn't explode or corrode, making it perfect for all sorts of uses. 00:16
Helium is the second most abundant element in the universe, but its concentration in our atmosphere is only 0.00053%. 00:52
The US uses half the world's supply of helium and has been selling off its reserves at a rate that will make us run out by 2020. 01:48