Those links say some REALLY bad things about lawnmower engines, and mopeds are pretty much the same things, right? I mean, we have bigger exhausts, but I don't know that that helps out any. There's no catalytic converter on my Puch, and I've never taken it to E-Check.
I don't care a whole lot, it still would seem more wasteful for me to drive a car that seats 4, or 6, or 7, than a one person moped.
My moped still is more fun than a car, and gets more miles to the gallon!