Cell phones that protect against deadly chemicals? Why not?

Do you carry a cell phone? Today, chances are it's called a "smartphone" and it came with a three-to-five megapixel lens built-in -- not to mention an MP3 player, GPS or even a bar code scanner. This 'Swiss-Army-knife' trend represents the natural progression of technology -- as chips become smaller/more advanced, cell phones absorb new functions.

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