We've already discussed the many ways that self-driving vehicles will eventually change modern-day society. And as the FBI recently reminded us, there are also some repercussions that most haven't even thought of.

During a recent interview with Fortune, MakerBot founder Bre Pettis brings up another interesting question as it relates to autonomous vehicles. As self-driving cars make our roads safer, where will we get organs?

It's a bit morbid to think about but it's a legitimate question. Automobile accidents are a major source of organ donations so without them, we will need another source. That other source, Pettis claims, will be 3D printed organs - a field that won't really take off until self-driving cars create demand.

It's a legitimate concern that few have likely pondered. As it is today, someone that's sick and in need of an organ transplant simply has to sit on a waiting list until someone else dies. Often times, that death occurs because of an auto accident. Eliminate accidents and you eliminate your source of organs.

Essentially, it's solving one problem and creating another.

And it's a problem that will need to be figured out sooner rather than later. That's because self-driving vehicles for the masses aren't really all that far off. The UK is planning a public beta test of sorts early next year while Google is already tackling busy city driving.