And here you were thinking Mercedes-Benz's Attention Assist system was the thing in driver alertness aides. In a rather odd, nearly jocose press release, Nissan has revived our faith in corporate R&D with the glorious introduction of the Forest AC. In short, this new air conditioning system "systematically controls cabin temperature, ventilation, aroma and humidity to create an optimal interior environment." Still bewildered? It means that the system can tap into an array of sensors in order to find out exactly what environment is best for your current state of mind, and if it needs to, it'll blast your nostrils with gusts of fresh forest in order to increase alertness while keeping stress levels down. The zaniest part of all, however, isn't the idea of using various aromas to keep one's attention; it's the fact that this system is actually scheduled for installation on a vehicle (the Fuga) that'll ship this fiscal year in Japan.