I'll give you three more reasons why going carless will help people lose weight. 1. For people who are overweight, the huffing and puffing (and in summer, the

I'll give you three more reasons why going carless will help people lose weight. 1. For people who are overweight, the huffing and puffing (and in summer, the heat and sweat) would kill their appetite for a while. Plus, nobody wants to eat a heavy meal if they immediately have to walk five minutes to the metro station, possibly spend fifteen minutes standing up at the station and on the train, and then walk ten minutes home. 2. For people who are overweight, the extra effort and side effects would be a constant reminder that they're fat. Nobody wants to hold up their friends on the street or be sweaty and gross on a day when nobody else is. It's easy to eat when you can avoid thinking about the downsides, but if you're still embarrassed by pausing on the stairs at the metro station that morning and stinking up the office when you arrived, you'll have a fresh reminder of why you should pass up the free donuts in the break room. 3. Psychology. I've lost a lot of weight "through exercise" because I overeat less when I exercise. Many people who exercise regularly find that they feel miserable, and eat more, when they stop exercising for some reason (injury, time, whatever.) I feel kind of like an exercise addict -- I know I'll feel down and gain weight if I don't do it. I suspect this exercise addiction is inborn in a lot of people, not created by exposure (like addiction to crack, for example) and is therefore more of a basic human need than an addiction. Adding twenty minutes of walking to everybody's day would boost the mood of all the unwitting exercise addicts and reduce their compulsion to eat.