Posted by el buzo viejo on May 07, 2001 at 17:18:46:
In Reply to: Only 14 more years to dive trimix??!! nt posted by AADIVER on May 07, 2001 at 16:43:55:
Estimates of worldwide deposits of recoverable helium should last into the next century at current usage rates.
Only 3% of the helium used each year is in breathing gases.