Welcome to European Tribune. It's gone a bit quiet around here these days, but it's still going.
It's a fair point and one they gave much consideration to with the result that they use the same tanks used by buses in Germany that run on natural gas which is highly explosive and needs to be carefully controlled coming out of the tank. Air of course is not.

"When men yield up the privilege of thinking, the last shadow of liberty quits the horizon." Thomas Paine
by Noel Guinane (noel at bloodandtreasure.com) on Fri Mar 31st, 2006 at 04:10:47 PM EST
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