The Environmental Protection Agency doesn't just want to clamp down on pollution... it wants to develop the technology that helps spot that pollution. It's handing out a total of $4.5 million in grants to six research teams (including Carnegie Mellon, MIT and the University of Washington) to help develop lower-cost, easier-to-use air pollution sensors. EPA officials hope that this will help neighborhoods track their own air quality and improve health on a local level. You'd have a better idea of whether or not industry really is contributing to the smog in your neighborhood, for instance. Although it'll likely take a long while before you see results come out these grants, they could easily pay off if they lead to cleaner air in your neck of the woods.