Crowdsourcing: Cell phones that protect against deadly chemicals?

Cell phones are getting smarter, and some day they may even protect you from toxic chemicals. The U.S. Department of Homeland Security's Cell-All is such an initiative. Cell-All aims to equip cell phones with a sensor programmed to either alert the cell phone carrier to the presence of toxic chemicals in the air, and/or a central station that can monitor how many alerts in an area are being received.

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