I wonder if it came about in the times when fuel was very expensive. A German physio I used to go to, told me when he was a kid they would have car free Sunday. Everyone walked or biked and the roads were full of pedestrians, it certainly would have cut 1/7th of the fuel usage.
It is, but you have to do something really abstract, like this meme, to not be able to come up with some excuse that nobody cares to verify.
I wonder if it came about in the times when fuel was very expensive. A German physio I used to go to, told me when he was a kid they would have car free Sunday. Everyone walked or biked and the roads were full of pedestrians, it certainly would have cut 1/7th of the fuel usage.