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"How is Helium produced?"
Production: Although Helium is one of the most common elements in the
universe it is a rare gas on earth. It exists in the atmosphere in such
small quantities (less than five parts per million) that recovering it
from the air is uneconomical. Helium is produced as a by-product of the
refining of natural gas, which is carried out on a commercial scale in
the
USA and........................
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