[MAGZine]

Selection bias... I used those bags for garbage too, but the number of bags I received to the number I used for that purpose was not comparable. There was already an abundance.

PlanetMoney said you needed to use a bag 131 times to be equivalent, not 7k. I see numbers floating around but no sources.

In any case. Reusing a bag not only reduces the bag usage the first time it's used but every subsequent time too. A reusable bags isn't preventing a single plastic bag, it's preventing at least one, probably two, maybe three and possibly four plastic bags each use considering how durable and large they are. Which is to say, you could fit (at most) two double bags of groceries into a single reusable.