If the folks at Vexia are to be believed, green transportation is not about fancy electric vehicles or, heaven forbid, riding your bike -- nope, it's about having a GPS that offers advice on your driving. Both the Econav 480 (4.3-inch) and 380 (3.5-inch) can be configured for your specific automobile make and model, after which your usual calm, solitary driving experience is replaced by the cold mechanical voice of a satnav as it admonishes you for excessive acceleration, breaking, driving past the speed limit, and so forth. With other Econav models out in Spain for a while now, these guys are finally available to environmentally conscious Britons at prices starting at £149 (depending on model and map collection). And what about the states? It looks like you'll be stuck taking driving direction from Homer Simpson for the time being.