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Apr 16, 2013 at 4:20 comment added SevenSidedDie You may be thinking of powdered chemical extinguishers. CO2 extinguishers in the other hand emit colourless gas that leaves no residue—it only makes a cloud because its extreme cold forces air moisture to condense suddenly.
Apr 16, 2013 at 1:03 review First posts
Apr 16, 2013 at 3:07
Apr 16, 2013 at 0:47 history answered Jim CC BY-SA 3.0