This is one smart device that every urban home could use – TechCrunch

Living in a dense urban environment brings many startup-fuelled conveniences, be it near instant delivery of food — or pretty much whatever else you fancy — to a whole range of wheels that can be hopped on (or into) to whisk you around at the tap of an app. But the biggest problem afflicting city dwellers is not some minor inconvenience. It’s bad, poor, terrible, horrible, unhealthy air. And