Independent group aims to be for emissions what NCAP or IIHS is for crash safety

Portable Emissions Measurement Systems (PEMS) on a Peugeot 308A newly formed organization called Allow Independent Road-testing (AIR) wants to make impartial emissions ratings available to vehicle shoppers. Using a simple rating from A (best) to H (worst), they would tell you, at a quick glance, how much you’re endangering the health of your family with tailpipe pollutants. Although the idea may seem...