I love my car and I just paid it off (finally). Unfortunately - I'd much rather be driving a hybrid. Is there any way that a gasoline car can be converted into a hybrid?

I figure that there must be a think tank out there working on this problem right now, and wondering if anyone has any information on the work being done and the progress.

It seems like a great solution, if it can be done. I mean, hybrid sounds great but then there is the question of what to do with the billions, and billions of normal cars on the planet.