Color-Changing Shirts Sniff Out Air Pollution

What if detecting urban pollution was as easy as looking down at your neighbor's chest? It is, if your neighbor is wearing one of the high-tech sweatshirts designed by New York University grad students Sue Ngo and Nien Lam.

The shirts, designed for a class on wearable technologies, feature internal organs that change colors depending on the levels of carbon monoxide in the atmosphere.