...there's this option! www.fuelvaporcar.com

Actually it's not an option quite yet but I'll be trading in my Camry Hybrid when they become available. They are reducing CO2 and NOX emissions by 80% or more with a stock Honda engine. This is the kind of technology that I think really holds promise...not hybrid cars that get 30-40 mpg. Although I love driving my Hybrid I have to say that I'm pretty disappointed with how conservatively it used the electric motor.