helium

Supply Depletion of Helium:

Current reserves of Helium are being utilized in its many applications much faster than are being replenished. Given this situation, there are major concerns that the supply of helium may be depleted soon. In fact, the worlds largest reserves in Amarillo, Texas, are expected to run out within the next eight years. This situation might be preventable if current users capture and recycle the gas and if oil and gas companies make use of capture techniques when extracting gas in order to replenish reserves.

Ref: Wikipaedia