well, the hyundai nexo claims to do just that.k, where hydrogen and oxygen combine to create the electricity that powers the car and charges the battery. but can it actually clean the air? well, we braved the very cold dundee air to put it to the test. so, over here we have robin hayles from hyundai. hi. hey, what's gonna happen? so, we're gonna demonstrate how the filtration system of a hyundai nexo cleans the air as it drives along. what we're going to do is we've got a pump here, which we're gonna add this, which is a jar of pm10 and pm2.5 particulates. nasty stuff! yeah. this is the stuff that comes out of trucks, cars, buses as they're driving along. so, that's soot and carbon and stuff like that? yes, yep. all right, so, no sniffing that then while we open the jar. we're going to bung that in there, aren't we? yep, my colleague, mr shim, he's gonna add that into the system. 0k. keep an eye on what happens to the air as we do it. you'll see the soon go into the balloon. wow! look at that! that looks filthy! imagine what would