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Besides, we currently drive around with a tank full of explosive material...

Not an accurate comparison though. A rupture of a tank of gas still has the potential to be an issue, but the rupture itself does not create an explosion. After all, the gas would require a rupture AND a spark to light it up. Even then, odds are a fire only, and not an explosion.
With compressed air, however, the rupture alone is sufficient to create an explosion.

Apples and Oranges if you aske me.

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"That was a little trick I call math. Oops, now I'm not emotionally invested..." - Dilbert
The only good thing I have to say about Barney Frank is at least he's not breeding...