A breakthrough technology developed by three engineering lads in Wales could hold the key to converting carbon emissions into beneficial substances such as biodiesel, methane gas, and fertilizer. The cleverly-dubbed Greenbox was designed to be fixed underneath one's vehicle where it could gobble up carbon dioxide and nitrous oxide until the next fill up, at which point the box would be switched out for a new one while the filled canister headed to a bioreactor for processing. Sounds complicated, we know, but strapping these bad boys beneath every gasoline-powered vehicle in a given nation could boost its biofuel production exponentially -- all without spending another penny (or pence) on research. Unsurprisingly, the trio of inventors are staying mum until they (hopefully) convince the government or a private company to grab ahold, but unless these boxes learn to swap themselves, we can't imagine too many individuals bustin' out the creeper for underbody work at each fuel stop.